Radio frequency (often abbreviated as, RF), can be described as any frequency within the electromagnetic spectrum with radio wave propagation that lie in the range extending from about 3 kHz to 300 GHz; this includes the frequencies that are used for communications or the radar signals. That said, you should know that RF generally refers to electrical rather than the mechanical oscillations.
RF communication utilizes radio waves rather than wires to exchange signals, and this is where the term "wireless communication," comes from. RF modules generally use frequencies to distinguish the different radio signals, therefore, in order for the RF modules to communicate, they have to be operating on the same exact frequency. That said, you should know that radio frequency is normally measured in units known as hertz (abbreviated as Hz), which represent number of cycles/second when the radio wave(s) is transmitted. 1 hertz (Hz) equals 1 cycle/second, and 1 megahertz (abbreviated as, MHz) equals 1 million cycles/second. A radio frequency (RF) signal basically refers to the wireless electromagnetic signal that's utilized as a form of communication, when talking about wireless electronics. As mentioned earlier, radio waves are a type of electromagnetic radiation which have identified radio frequencies which usually range from about 3Hz to 300 GHz. Not every radio wave is the same; they can be small or big, or they can be far apart or close together. On the radio stations we normally listen to, every station uses waves which are on a slightly different frequency from the other stations. Whenever you happen to switch from one radio station to another, your radio picks up and then plays waves of that particular frequency. Frequency normally refers to the oscillation rate of the radio waves. It can also refer to how close together or far apart the waves are. When the radio waves are too far apart, that is known as low frequency, and when the radio waves are close together, that is known as high frequency. That said, you should know that radio frequency propagation happens at speed of light, and doesn't need any medium (such as air) in order for it to travel. Radio frequency waves occur naturally from lightning, the sun flares, and even from stars which radiate radio frequency waves as the get older. However, people usually communicate with man made radio waves which oscillate at various select frequencies. The man made radio frequency waves are produced by oscillating current for a certain number of times, and radiating it off the conductor (which is referred to as the antenna), into an empty space (this is the space that's occupied by air and not the outer space), as electromagnetic radio waves. The RF signals are received and sent using conductors via the phenomenon that's called the skin effect, where radio frequency current latches itself and then flows through the conductors' surface; this effect is actually the basis and the core of radio technology. The best thing about RF communication, is that it's omnipresent (that is to mean it's all around us). It plays a crucial role in many of the communications systems which we depend on a daily basis, such as fire and police radio systems, TV and radio broadcasts, and satellite communications. Cordless phones, cellphones, Wireless internet (Wi Fi), and Bluetooth also operate in the radio frequency spectrum. In addition to that, there are other appliances outside of the communications field that use RF. They include; microwave ovens, garage door openers, among others. Some wireless devices such as TV remote controls, cordless computer mice, computer keyboards, and even two way radios also operate using RF frequency. Two way radios are based on the RF frequency and they perform group communication using minimum radio frequency channel resources. This is to mean that if all the users are in the same location or area (most of the time), you will only need a single channel resource in order to talk to them. By using RF, two way radios have the capability of facilitating âone to manyâ group communication (which is also known as a group call), very efficiently. By efficient, I mean that 1 user can communicate/talk to 1, 5, 10, 100 or even 1000's of users at a go. The two way radio user doesnât need to keep on repeating the same message if he/she needs to convey to many users.
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There are many instances where people get confused when talking about types of headsets and the associated equipment. In this article, we are going to help you get a clear understanding of the different types of headsets and the associated equipment. With that said, it is important to note that the names that have been given below, are the actual names that need to be used. Without any further ado, lets get started;
In Ear Monitors Also known as in-ear (or canal) headphones, these devices sit inside the user's ear canal, and they deliver great sound quality; they ensure a controlled and precise sound. They also fill the ear's entrance, thus are very effective at sealing out any unwanted external noise. These devices include a transmitter which is controlled by an audio engineer which then transmits to the belt-pack on the user. The in ear monitors allow freedom of movement and are commonly used by modern pop artists. They're very small and allow them to comfortably hear the rest of the band, and also themselves (this is what's known as monitoring or foldback). Apart from artists, these devices are commonly used by audio engineers to hear the mix of the vocals and the stage instrumentation for recording studio mixing and/or live performance. Two Way Radio Headsets Two way radio headset is a communication device which can transmit and also receive signals. A two way radio headset allows the user to communicate with other people with similar Two way radio headsets (and are operating on the same channel or radio frequency). 2 way radio headsets are readily available in mobile and also hand held portable configurations. The handheld Two way radio headsets are also known as walkie talkie headsets or handie talkies. One thing to note about two way radio headsets, is that the user can either transmit or receive signals and not both at the same time. Two Way Radio Covert Pieces These are quite similar to the Two way radios, however, they are much more discreet. 2 way radio covert earpieces are usually used by security personnel as they prefer staying discreet. This type of walkie talkie headset is also ideal for the Door supervisors and security staff. Wired Show Comms Unlike 2 way radios, these type of communication systems allow for both talking and listening even at the same time. These devices have a closed cup design, meaning they fully cover the ear which helps reduce the ambient noise. Wired show comms come in single muff and double muff versions. They get attached to the belt pack controller which is then physically wired to the system. Because of the cabling that's involved in wired show comms, there's less mobility thus are best suited for managers and the static technicians. These specialist communication devices are also commonly used for calling shows. Wireless Show Comms These are very similar to the wired Show Comms, only difference is that their belt packs are wireless. The device and the belt pack are compatible which means that the users can freely and comfortably move around, thus are ideal for stage managers, front of house managers, among others. Just like the wired show comms, these devices also allow both talking and listening at the same. With that said, you should know that the wireless show comms are relatively more expensive than the wired show comms. Some of the other applications for these devices include, but not limited to; security personnel, broadcast, marines, theater, and colleges. They can also serve as convenient walkie talkie headset for events. Radio Performer Headset This is the device that's used by presenters and performers. This device allows for the user's voice to get fed into the sound system where the audience can get to hear them. This device is usually used in conjunction with the radio belt pack system. Most of the devices used today are generally very thin and skin colored which helps reduce visibility when the performer is on stage. Presenter Talkback These are the small ear pieces which you see the lead presenters on TV talk shows wearing. This device allows the producer (of that particular TV talkshow or program), to communicate to the lead presenter and update them on the show's progress. This may be done using a system known as in ear monitoring. Alternatively, wireless show comms systems can also be used. Buying two way radio equipment is a very beneficial investment, but in order for you to get the most out of your money you should ensure that the equipment is well cared for. If you use and maintain your two way radios with proper care, they will function at their optimum capacity and you can expect them to last for many years. While no 2 way radio can last forever, there are some simple practices which can help extend the life expectancy of your 2 way radios and ensure they function at their very best. In this article, we are going to take a look at some of the top care tips for your two way radios;
Storage You should always store your radio(s) correctly so as to keep it in a tip top condition. The ideal environment for storing your radio involves a cool and dry (ideally at room temperature, which should be about 72 degrees Fahrenheit) with limited exposure to the extreme weather conditions like excessive cold or heat, and such other elements of water and sunlight. Excessive temperatures can easily damage the batteries; the moisture may end up corroding the batteries. Also, when storing your 2 way radio, you should make sure that it's turned off and batteries are removed. Charging Your two way Radio First of all, you should know that 2 way radios are usually slightly different, so you need to familiarize yourself with the specific charging instructions of your radio. That being so, it is important to note that nearly all of the manufacturers will advise that you to turn off your radio while itâs charging. If you do not, your radio will be drawing current and also charging at the same time, and this can end up shortening the lifespan of the battery. Overcharging your radio batteries can also cause numerous problems and will have a negative impact on its' overall battery life, so you should make sure that when it's charged fully you unplug its' charger; do not leave it charging all through the night if its' likely to remain fully charged for a long period of time while its' still being charged. When you buy new batteries its' the only time you can leave the radio charging overnight before you start using them for the 1st time; it'll help you get the maximum battery capacity. Day to Day Use Every two way radios user should be very mindful of their daily use. Although there are some two way radios which are designed to be quite robust, like the explosion proof and waterproof radios, they should still be treated with great care, always. Even if you have a waterproof or explosion proof radio, do not subject it to extreme temperatures. You should also avoid grabbing your two way radio by its' antenna, as this will eventually have a negative impact on your radio's reception and transmission quality. In addition, you should also avoid drops so as to maximize the long term functionality of your radio; consider using 2 way radio belt clips so as to reduce the chances of your radio getting dropped and subsequently getting damaged. Protecting the exterior of your radio helps protect its' interior, thus minimizing the repairs and the replacing of the equipment. Another important tip to note when it comes to the day to day use of 2 way radios, is you should never expose your radio to any solvents (unless it has been designed to be used in the harsh conditions); this includes any cleaning fluids and alcohol. Also, try and stick with the accessories which are designed specifically for your particular type of radio; this is especially important when it comes to your radio battery, charger and adapter. Using an incompatible accessory can end up shortening your radio's lifespan and can even destroy it. Cleaning Your 2 way Radio You should regularly clean your radio to keep it in good working condition. The most effective and efficient way of cleaning your two way radio also happens to be one of the easiest ways as well; strong chemicals or intensive cleaning isnât necessary. The only supplies you'll need include some water and a microfiber cloth. The microfiber cloth will effectively wipe away the smudges and dirt without causing any damage to your radio. As for the more stubborn marks and stains, you can use a damp cloth and then wipe until the radio is clean. Remember, never immerse your 2 way radio in water to clean it. Conclusion 2 way radios are among the most versatile and toughest communication solutions, often lasting for many years before needing any repairs or replacement. However, in order to extend the lifespan of your 2 way radio even further, it is best to employ the above tips for 2 way radio care to fully secure your investment. Protecting your 2 way radio will not only increase its' longevity, but it also ensures that you will always have reliable communications. Well, as you can see above, taking care of two way radio is relatively easy, and the amount of maintenance required is minimal. A simple cleaning now and then, proper handling, maintenance and storage is all you need in order to extend the lifespan of your two way radio and keep it in a great working condition. We found this article and couldnât not post this to our blog, it shows how hearing damage is on the upsurge. With cases of hearing loss growing every year, hearing amplifiers and hearing aids sales have consistently increased. There doesnât seems to be an answer to this rise but as technology improves, answers can come that way.
Hearing loss can occurs when inner ear or nerve is damaged, which may be caused due to diseases, aging, loud noise, and medications. Hearing amplifier is a small part of hearing aid which makes the sound louder. Hearing amplifiers increase the power of signals and then send them to the ear through speakers. Hearing aid is useful in improving the hearing and speech of patients. An otolaryngologist investigates the cause of the hearing loss. An audiologist is a hearing health professional who identifies and measures hearing loss and will perform a hearing test to assess the type and degree of hearing loss. Increase in number of hearing impairment cases coupled with rising costs of hearing aids are expected to drive the growth of the global hearing amplifiers market during the forecast period. Majority of the consumers use hearing amplifiers or personal sound amplification products (PSAPs) as they are considered cheaper alternatives of hearing aids. Hearing amplifiers or PSAPs, are designed to amplify sounds in any recreational environment and are exempt from the Food and Drug Administration (FDA). Hearing amplifiers are sold directly to consumers as electronic devices without the requirement of a physician prescription. According to National Institute on Deafness and other Communication Disorders (NIDCD), approximately 324,200 cochlear implants have been implanted worldwide. About 15 percent of Americans (26 million people) between the ages of 20 and 69 have high frequency hearing loss due to exposure to noise at work or during leisure activities. Major driving factors for the growth of the global hearing amplifiers such as an increase in the number of prevalence of hearing impairment patients in old and young population, increasing investment in research and development in ENT field among others. Based on styles or design types of hearing aid products the global market of hearing amplifiers can be segmented as follows: -Behind-the-ear (BTE) -Mini BTE -In-the-ear (ITE) -In-the-canal (ITC) Based on function the global hearing amplifiers market can be segmented as follows: -Analog hearing aids -Digital hearing aids Based on distribution channels the global hearing amplifiers market can be segmented as follows: -Hospital Pharmacies -Online Pharmacies -Independent Pharmacies and Drug stores Hearing amplifiers market is segmented into five major regions: North America, Europe, Latin America, Asia Pacific, and Middle East & Africa. In 2015, North America lead the global market of hearing amplifiers followed by the Europe in terms of revenue. According to statistics compiled by the National Institute on Deafness and Other Communication Disorders (NIDCD), 37.5 million adults aged 18 and older in America report some form of hearing loss. According to the National Institute on Deafness and Other Communication Disorders (NIDCD), 28.8 million U.S. adults could benefit from using hearing aids and more than 90 percent of deaf children are born to parents suffering from some kind of hearing disorder. Globally, the hearing amplifiers market is expected to witness a healthy CAGR in terms of revenue during the forecast period. Latin America, Middle East & Africa and Asia Pacific regions are the emerging markets in the global hearing amplifiers market. Increasing awareness among the various distribution channels as well as consumers in these regions is anticipated to propel global market growth of hearing aids and amplifiers during the forecast period. The key players in the global market develop hearing amplifiers in analog and digital forms. Some of the top companies in the global hearing amplifiers market are Sound Hawk, Resound, Foshan Vohom Technology Co. Ltd., Sound world solution, Shenzhen LA Lighting Company Limited, Austar Hearing Science and Technology (Xiamen) Co., Ltd., Huizhou Jinghao Electronics Co. Ltd., Ziphearing among others. 2016 was the year of the Virtual reality headset, we are seeing the first versions of a technology that can, and possibly will, change our lives, much like the smart phone has. VR has the potential to improve our Games, TV programmes and Movies and allow us to experience things and places better. This article is about how your in-flight might be improved by a VR headsets.
No one likes flying during the holidays. Between having to leave two hours ahead of time and getting through security, just getting to your flight feels like a trip in itself. And then you get on the plane and have nothing to do for three hours except watch reruns of Friends on the little TV in front of you. Thatâs probably about to change, thanks to VR. For a little while, of course, passengers can plug into their own Samsung Gear VR sets and tune out, but airlines might be offering their own complimentary variety so you can forget youâre stuck on an airplane. A French start-up, SkyLights, is developing the tech. Itâs a headset with a six-hour battery life, and it comes with noise-cancelling headphones. The headset looks pretty sleek and simple, because theyâre made to be: Thereâs none of the neater interactions you get with an Oculus or Samsung headset. It really is just a movie beamed right into your face. Youâll be able to watch the newest 2D and 3D movies, and the set comes with 128 GB of storage â about 40 movies. Weighing only slightly more than half a pound, itâs easy to visualize the headset propped on the back of the seat in front of you, and after paying the fee, you can flip it on and enjoy hi-def movies right in front of your face. The headsets are being tested in France right now: XL Airways became the first headset to offer a commercial version of the headset to passengers last week, for $16 per flight. SkyLights has also partnered with AirFrance and Airbus. Content-wise, there are partnerships in the works with 20th Century Fox and Dreamworks. The general lack of viable in-flight entertainment has been plaguing the airline industry for a while; broadband Internet is an extra cost (roughly $10 per flight, depending on your airline), and the movies and TV they show are typically outdated. It wasnât until recently that airlines began attempting to match the broadband speed youâd find on the ground. (As of last year, youâd get speeds of around 3.1Mbps, as opposed to the roughly 30Mbps that smartphones on the ground are capable of). Since so many people use their own devices for entertainment, airlines are in desperate need of upping their Wi-Fi speed. But they also need ways to entertain their customers in an inexpensive manner, without the heavy screens and cables that come with TVs. Virtual-reality headsets â light, not-too-costly, and wireless â could offer a way for airlines to draw their customer base back in. But there are challenges: VR headsets are a relatively new and untested technology. âAirlines are difficult players to deal with because they are risk-averse and slow to innovate,â David Dicko, SkyLightâs CEO, told the Times. One potential problem for in-flight VR in your face is the nausea it causes. VR (even if itâs just a film) can be very disorienting, and itâs not hard to imagine people getting sick from it on a moving plane. Oculusâ health and safety documentation is a laundry list of potential concerns, from warnings of dizziness and nausea to seizures and sweating. Another potential issue could be that hundreds of folks tuned out to a VR movie with noise-cancelling headphones have, at the least, limited awareness of the outside world. That means slowness to react in plane emergencies â another potential lawsuit on an airlineâs hands. For now, weâre skeptical that VR headsets will take off as in-flight entertainment in the U.S. anytime soon. Early adopters might be eager to try them â but they also have their own headsets that they can use for free. Customers would have to pay over the price of a movie ticket, the technology is unstudied when it comes to usersâ health, and everyone has their own phone or tablet to entertain themselves. We love the idea, but, as Dicko noted, the airlines are a pretty risk-averse industry. They should prioritize Wi-Fi bandwidth first (and make it at least cheaper), which is what the majority of customers undoubtedly want. Anyway, itâs hard to imagine a more Black Mirrorâesque image than a hundred people, arranged into rows, their heads leaning back, eyes hidden behind a headset, plugged in to a world that isnât there. This article is the transcript of an interview with Igal Golva, CEO of Axum earphones, wireless earphones with secure fittings, designed for people doing exercise. A really interesting article about why these earphones are different to others on the market and what their plans are for the future of the company.
Mobile audio has always been a difficult balancing act. The need for great audio on the go has never been more prevalent. With smartphones now a staple for most peopleâs daily commute, exercise and fitness, the need for an audio solution that can be portable while still sounding good is the holy grail. Apple, with the iPhone 7 has also forced peopleâs hands. The headphones they used to use are no longer as easy to pull out and plug in without the use of a dongle. This is where Bluetooth audio options come into play, and where the Axum wireless headphones are planning to make a splash. Currently on Indiegogo, the Axum are aiming to give people great audio, while ensuring they maintain that mobile, ultraportable feel. Currently at 528% funded, the Axum is proving to be a product many people want to get their hands on. We had a chance to talk to Igal Golvan, CEO at Axum, about what the headphones can do for audio and fitness and how they hope to change the way people view Bluetooth audio. CGMagazine: Could you tell us a little about what Axum does and how these new headphones stand above the competition? Igal Golvan: First of all, we not only offer four hours playtime (while others offer 1.5-2 hours) you can also get an additional four with the portable charging case. We achieved it by eliminating any unnecessary features. We are aiming to reach fitness junkies like us that need three things: fit, sound and battery life. Our designers made a unique design that will fit you during the most extreme sport activities. In the last months all we did was test the earphones in every sport activity you can imagine .This included cycling, running, CrossFit , snowboarding and even sky diving . The issue with True Wireless Earbuds is that all our competitors see this product as the latest technology in the headphones industry and as such they've aimed the technology at early adopters. Unlike them we understand the real potential of the product to become the mainstream earbuds of athletes, as the lack of cables is something so comfortable no one can even imagine, only when doing sport activities and listening to Axum earphones will you really understand the definition of freedom! CGM: Could you go over what M-voiD® sound technology brings to the table? IG: Sure. M-voiD stands for Multidisciplinary virtually optimized industrial Design. Itâs a technology for the realistic simulation of audio systems using CAD data. It is a sophisticated technology that paves the way to reproduce outstanding sound performance to let consumers discover that earphones deliver the emotions and excitement comparable with a concert. Realistic and predictive simulations by means of a fully coupled multiphysical electrical-mechanical-acoustical simulation model are the heart and driving backbone of M-voiD® technology. The major advantage of M-voiD® is that acoustic problems can be identified and resolved in the virtual domain before any prototype is being built. Sound characteristics are virtually measurable and assessable and can be optimized on the virtual model. It is not just limited to the graphical reproduction. M-voiD® listens to the virtual sound of the earphone already on the computer by means of a special reproduction technique (called auralization), enabling improved sound. Bottom line, while even the largest companies out there can test 100 or maybe 10,000 prototypes to check and improve the sound quality before releasing the final product, we had the ability to test sound quality from over 10 million prototypes. Besides that, Konzept-X also helped us with the driver design itself to maximize the results after we've changed the internal design. CGM: With your Indigogo doing so well, do you foresee this will delay the final release? IG: Exactly the opposite. We planned to wait until the funding period is over to head into mass production, but now that we understand the demand we'll start doing it ASAP. CGM: Why the choice to go with Indigogo over an option such as Kickstarter? IG: We thought about KS, however the Indiegogo team was much more supportive and offered lots of relevant information on how to succeed with crowdfunding . We are product people and don't understand crowdfunding, so a supportive team was something very important for us. CGM: Do you plan to offer a retail version of these headphones? IG: Of course, but first we'll ship everything to our backers and then we'll think about retail. CGM: For the gamer on the go, will these offer anything beyond what is already in the wild? IG: The perfect fit of Axum earbuds is something like you've never experienced before, you can see the bulky design of other brands such as Samsung and Motorola The last thing you want to do is wear those gigantic things all day long. CGM: How do you think these headphones will do with the fitness crowd beyond just the music listener? IG: We believe that beside the sound quality, the fit and comfort is something they'll be addicted to. We noticed the reaction of the people while testing them out in the gym and we guarantee that once you try Axum earbuds you'll never be able to use wires again! CGM: Are there any obstacles you will need to overcome to bring these to market? IG: Yes, there are many obstacles of unawareness from the customers. Many people are not familiar with this concept and think of it as a regular mono Bluetooth ear piece, so we are heading to a long journey of explaining our product and turning it into mainstream. CGM: How do you feel these headphones will do with a crowded market? What sets Axum apart? IG: We have full confidence in our product. First of all we know 100% that no matter how good your BT earbuds are, if they are not True Wireless they can't compete with us. As for other True Wireless companies out there, based on their design they've never thought about athletes as their potential customers and it's a shame as this concept is perfect for fitness and exercising. So we already have a huge advantage on them. Sorry, but youâve been had. Although many manufacturers boast that their radios can reach amazing distances, this is, in almost every instance weâve encountered, a fallacy.
How is this legal, you may ask? Essentially, your radio quite probably could work over a range of 25 miles, but that is a theoretical estimate, working on the assumption that the myriad variables that affect two-way radio signal (such as atmospheric conditions, topography, objects in the way and etc) are simply not in effect. All of them. At the exact same time. So, assuming that you used your two-way radio in a vacuum, where weather didnât exist and no obstacles, man-made or otherwise, were present, you would be able to communicate with someone else who was further away in that impossible vacuum, maybe even 25 miles away, but otherwise? Forget it. The fact is that the average two-way radio has a range of between one and two miles and not much more (maybe three, but weâre not making any promises). CB radio fares significantly better, largely because it makes use of large aerials. Now, Signal-boosting equipment can be used to improve your two-wayâs performance (for example, repeaters), but such equipment is expensive and hard to obtain for legal reasons. There are, however, a few factors that can have an affect on your radioâs range. The frequency being used, the power output, the size of the antenna, the complexity of the signal being sent, signal interference, background noise and (as we wrote earlier) objects in the way are all factors that can improve (or hamper) your efforts to get your signal to reach as far as possible. So, talking on your radio whilst in the car will have a deleterious affect on your signal, as will deliberately walking through wooded areas or places with a lot of rocks/mountains if you can take an easier path. However, a larger antenna (if youâre tech orientated, the antenna can be replaced with a better one â although this should only be attempted if you are
And
Also, your choice of VHF or UHF radio will have an affect as well, a UHF signal, for example, generally penetrates buildings and objects better than a VHF signal, whereas VHF is better for outdoor use where there is a lot of open space to transmit across. Having said/written that, even in optimum conditions, you are extremely unlikely to transmit over a distance of 25 miles. Sorry. As an aside, mobile phones donât suffer from this lack of coverage, largely because cell towers are in place that bounce the signal from one to the other and thus carry it across a far larger area, your mobile is still your best bet to break that 25 mile mark, weâre afraid. If you really must use radio communications over long distances, we recommend going to the Website 2 way radio online Hope that helps. Motorola solutions are a company well known for their robust two way radios and for building world class communication structures. Improving on the current TETRA system with an IP dispatch console and piloting the WAVE system, that allows a phone app to connect to the radio system, for communicating of site. You can read more about what Motorola are doing for Munich below and you can find the original article here.
Motorola Solutions has received an order to implement a comprehensive update and extension of its existing TETRA digital two-way radio system at Munich Airport. The newly modernized communications infrastructure ensures greater connectivity, interoperability and collaboration between various business and operational functions at Germanyâs second largest airport. Motorola Solutions will also provide services for ensuring smooth operations. Within the framework of the TETRA radio network refresh, Motorola Solutions is equipping the airport with a new MCC 7500 IP Dispatch Console. The comprehensive, scalable solution enhances the IP architecture to ensure optimum call set up and availability. It will also allow Munich Airport to expand its communications infrastructure in the future without interrupting existing services. As well as this, Motorola Solutions will implement two TETRA base stations for improved TETRA radio coverage in the terminal buildings. Alongside the improvements to the TETRA system, the airport has started a pilot project for the potential introduction of Motorola Solutionsâ broadband push-to-talk (PTT) platform WAVE. The goal of the installation is to ensure that airport staff can communicate, no matter which device or infrastructure is being used. The powerful PTT solution WAVE⢠Work Group Communications provides airport authorities with secure and reliable communications beyond TETRA radio â including broadband devices and networks â to enable greater workforce connectivity, interoperability and collaboration. WAVE connects the TETRA system used by administrative staff with service management employees who join the broadband platform via smartphones, computers, other radios or telephones, meaning that staff across the airport can communicate with one another from virtually any location. âWe have been working with Motorola Solutionsâ TETRA two-way digital radio system since 2007,â said Michael Zaddach, head of the IT service division at Flughafen München GmbH. âThe update of our TETRA infrastructure enables us to further improve our communications in airport operations and make our processes even more efficient.â âWe are collaborating closely with Munich Airport to provide a future-proof TETRA digital two-way radio network,â said Klaus-Dieter Drossel, sales director for key accounts, Motorola Solutions Germany GmbH. âWe are also pleased that Munich Airport is testing our broadband push-to-talk platform WAVE, and we are certain that it will enable airport staff to work together more closely, no matter which device or network they use.â 1. Using a Mobile Phone And Bluetooth headsets or Earpiece
To do this, you simply need to go into your mobile phone's settings and then change answering mode to Auto; this enables your phone to answer automatically when you ring it. Most mobile phones only work in the Auto answer mode, after you have plugged in the headset. After turning on the Bluetooth headset, make sure it's properly paired with your cell phone, and confirm the battery has adequate charge. Hide your Bluetooth headset somewhere you know it'll pick up the sounds clearly, however, make sure that it's well hidden. Leave the room, however, do not go very far. The Bluetooth connection will work through the walls, but if you happen to go far away, it'll not work very well (the range can be up to about 30 feet or 3 rooms away). Now test your cell phone by calling it to see how far you can actually go and still get to hear the bugged room through the Bluetooth headset. You can wait for the conversations to get to the interesting part, and then turn on voice recorder on the cell phone; it should be able to record via the microphone of your Bluetooth headset. 2. Using a Two Way Radio and Earpiece Two way radios allow users to communicate when they're far away such that they can not hear each other. These devices use radio frequencies instead of cell phone towers which means they will work in areas where there's no cell phone coverage or reception. The two way radios offer instantaneous communication; users simply need to press the Push-To-Talk (also known as PTT) key, and they can instantly talk and convey their particular message to the other party. This is due to the quick call setup time that's entrenched in this technology. The ability to offer quick communications is one of the reasons why most organizations prefer the two way radios for their tactical and operational communications. Another great feature of the two way radios, is the ability to facilitate one to many (also known as, group calls) communications effectively. This basically means that a single user can conveniently communicate with 2, 10, 20, and more, of other two way radio users at the same time. In short, there is no need for you to repeat time and time again when you want to communicate with many people and using a two way radio earpiece, this communication is much more secure 3. Ear Spy Application Ear Spy App is a great eavesdropping tool. Depending on just how good your cell phone is, this app can become a very high powered listening tool. Ear Spy application can route the audio from your cell phone's mic right to to your headset letting you eavesdrop on the people around you whilst remaining inconspicuous. When using a Bluetooth, you can use this app to spy from a room nearby; you simply need to leave your cell phone near the target, and then use your Bluetooth headset to eavesdrop. If you want to fine tune the incoming signals, you can use the graphics audio equalizer. Whether you wish to eavesdrop on particular conversations or you just want to play some spy games, Ear Spy application will be of great help in your endeavor. You should know that this app requires you to use headphones, otherwise you will get poor audio feedback. 4. Spy Glasses This spy device comprises of an in built Bluetooth transmitter which looks like ordinary glasses, a microphone and a wireless earpiece. Connections between the glasses, the earpiece and your cell phone are wireless, thus totally unnoticeable to other people; the device's ultra compact design basically ensures nobody will know it is a spy tool. Spy glasses are compatible with almost any mobile phone which has the Bluetooth option. Actually, the Spy glasses are universally compatible with all the standard Bluetooth enabled equipment including computers. Some of the features of this device include; excellent transmission and reception of audio signals, built in microphone, and a large capacity Lithium battery. 5. Micro Air Vehicles (MAVs) Modern technological advances are ever increasing human's potential for developing tiny things. As for the United States Air Force, this translates to revolutionary designs in the air vehicles to provide the war fighters with new tools which can enhance both the situational awareness, and also the capacity of engaging quickly, accurately, and with minimal collateral damage. This is where Micro Air Vehicles (also known as MAVs) come in. The term MAV or micro air vehicle, refers to the a new type of advanced remotely controlled aircraft (abbreviated as, UAV) that's significantly much smaller than other similar aircraft. Typically, MAVs can easily blend in with the surrounding environment, stay in air for a long period of time, and can go places which can't be reached safely by humans, or most of the other types surveillance equipment. The target dimensions for MAVs is approximately 6 inches (15 centimeters), and the development of actual insect sized aircrafts is expected in near future. As a matter of fact, various efforts in the research on micro air vehicles have involved attempting to mimic flying insects so as to achieve the flight capabilities which aren't attainable through the use of other means of aerial propulsion. In the year 2007, a bug like Micro air vehicle model with a wingspan of 3 cm was revealed at a robotic's conference; in the year 2008, the United States Air Force released a video showing Micro air vehicles which were the size of a bumblebee; and in the year 2012, some engineers from Johns Hopkins University started studying flight of butterflies to discover how airborne robots can mimic their maneuvers. The potential military use is 1 of the key driving factors, although the micro air vehicle can also be used commercially, as well as in scientific and mapping applications. The main military use envisioned for the micro air vehicle is gathering of intelligence via the use of microphones, cameras, or other types of sensor. Conclusion Some of the above points are illegal, and you should not do any of them. Also, do not use any of the above methods to record any intimate relations; the legal consequences of doing so are very severe. Finally, keep in mind that it's illegal in the US to make recordings of people without their consent/permission; and depending on what you'll do with the recordings, you might find yourself in big trouble. A two way radio is a type of communication that can both receive and transmit information. The radio enables the operators to have conversations with other similar radios operating under the same (channel) frequency. Two way radios are available in stationary base, hand-held portable and mobile configurations. Often, hand-held radios are called handie-talkies, or just walkie-talkies.
Two way radio systems normally operate in a half-duplex mode, in which the operator can listen, or he can talk, though not at the same time. A âPress To transmitâ or âpush-to-talkâ PTT button initiates the transmitter when released, hence activating the receiver. A cellular telephone or mobile phone is an example of a two way radio that both receives and transmits at the same time (full-duplex mode). Full-duplex is usually achieved through frequency-sharing methods or by using two different frequencies to simultaneously carry the 2 directions of the conversation. Dynamic solid state filters and use of two antennas are some of the methods used for mitigating the self-interference caused by simultaneous same frequency reception and transmission. Types of two way radio earpiece Two way radio earpieces come in a variety of types. They include: D ring, acoustic tube and ear hook. The acoustic tube type features a wireless transceiver operating in a radio-frequency band that receives audio signals. It has an acoustic chamber and an acoustic transducer, which is coupled electrically to the transceiver, and operates to activate acoustic signals. Connectors As far as covertness is concerned, communication must definitely be very discreet, whether itâs a just a private group or a security personnel of designated people. Two-way radios are used for conversations between compatible devices in a given location. Nonetheless, it would be much less comfortable if somebody talks through the radio and the entire communication is disrupted. Thatâs why there are different types of two way radios connectors in the world, and they include Motorola, Hytera, Icom, and Kenwood, among others. Motorola is the leading connector of two way radio communications controlling about 45% of the market. It would be super stylish and discreet if you had a Motorola radio-earpiece to accompany your radio. Hytera is another one of the best connectors you can find on the market. Its products are easily available on leading websites with all the necessary accessories. There are plenty of different radio earpieces designed by Hytera but most of them come with few accessories less or more. There is not much difference on how they are built or in their quality. One important thing to have in mind is that there are three basic types of two way radio earpiece kits; the 1-wire, 2-wire and 3-wire. A 1-wire kit and 2-wire kit features a single combined microphone and âpush to talk buttonâ which clips to your collar. A wire with an earpiece then extends from this button, but from the connector on the 2-wire. A 3-wire kit has a wire with a combined âpush to talkâ button and microphone that can be run down cuff or collar. There is another wire with an earpiece clip on it. Other kits have a second push to talk button that clips to your pocket or belt near the radio. This is an excellent story about how hearing protection is sometimes be essential, and when youâre on the shooting range it has to be vital. But it is important to get the right set of headphones that will protect your hearing sufficiently. Lessons can be learnt from this excellent case study.
There is no doubt that we all take our senses of sight, smell, and hearing for granted as long as we are strong and healthy and everything is working well. When we are young we tend to believe that we are indestructible and readily adopt the idea that âit will never happen to me.â Consequently, we can develop some bad habits and be a little loose when it comes to preventative measures for almost anything. I know because that was my attitude at thirty years old when my eye doctor made a comment in passing that my eyes were perfect, but the chances are I would be needing reading glasses by the time I was 50. I scoffed, but you could almost have set your watch by it because by the time I was in my late 40âs my arms started to get shorter when it came to reading, tying on fishing lures and other things that required scrutiny up close. At 50 I was wearing reading glasses. Growing up I never bothered too much about wearing ear protection. When I was plinking it was with a .22 rifle that only put out a little noise if you were the shooter so the thought of hearing protections seemed ludicrous. When hunting I do not know if I have ever heard my firearm discharge and beside that unless I was dove hunting I seldom shot too many shots anyway. The change of heart came when I started shooting on an indoor range, while in the Air Force. I noticed after shooting a few rounds with my .22 caliber, Ruger Single Six that my ears would ring for a while afterward. One night a grizzled old Master Sargent suggested I wear ear protectors or take a chance of damaging my hearing. I took the recommendation to heart and have been wearing them ever since. The result has been that after many years of shooting .22âs, large caliber handguns, rifles and shotguns my hearing is still intact and working well. Shooting is not the only activity that can cause hearing problem as any loud noise can damage your hearing. The intense vibration caused by loud noises can injure or destroy the hair cells inside the cochlea, so they no longer function to transmit nerve impulses to the brain. If that happens, you will experience hearing changes. Hearing protection is needed anytime one is exposed to sounds above 80 decibels (dB). Normal human conversation runs about 30 to 35 dB. At its peak level, the sound of a 12-gauge shotgun is about 140 dB. 9mm runs around 159 dB and a .38 special with a six-inch barrel is about 156 dB, a .22 LR pistol with the same length barrel 140, an M-16 is about 154, a .45 ACP pistol is 155, and a .357 Magnum revolver is 164. All of them are around double the safe sound level. Just to be on the safe side I used to wear muff type hearing protectors and usually ear plugs also when on the range. For range use today there is an array of muff style hearing protectors. The new style that I now use have not only hearing protection, but also hearing enhancement. The controls on each ear can be tuned to match your individual optimum hearing and increase the volume up to eight times normal. So when the range master gives a command or when you are speaking with a companion on the shooting line you can speak in a normal voice and hear them as well or better than without the power muffs. Yet when you shoot the sound activated compression circuit reduces the sound from the shot to a noise reduction rate of 24dB. This is very important on a shooting range because I have missed range commands in the past from the range master simply because I could not hear them through my hearing protection. The new muffs I use are from Walkerâs but they offer many other styles in their Game Ear series. These are unlike the muff style protectors as the bulk of the unit fits behind your ear with an earpiece that fits inside your ear, the unit weighs less than one fourth of an ounce and can be used with or without glasses. These too can be fine-tuned to your specific hearing, allow you to turn the volume up to magnify sounds from five to seven times and still reduce the sound of the shots to a rating of 29dB. The ability to custom tune the devise to your hearing as well as adjust the volume up on these models will enable the hunter to more readily pickup games sounds in the woods. Sounds like a squirrel jumping through the trees or when their belly slaps a tree when they jump from one to another. It will help the hunter pick up the minutest sound of a deer brushing by limbs or the whisper of them walking through leaves or disturbing a rock. So now there is really no acceptable reason not to wear hearing protector and if you get a good set it may even enhance your chances of bagging some more game. You may get confused about various types of walkie talkies on sale in the UK, or not be certain what type of walkie talkies you require, and what youâre legally allowed to use in some other countries that you plan to visit, or in your part of the world. Firstly, it is important to have in mind that any type of walkie talkie will function in any part of the world.
A walkie talkie is used on a channel that has a frequency associated with the walkie talkie. In other words, if a channel has a frequency different from that of a walkie talkie, then the two will not work together. License Free Walkie Talkies There are 446 license-free frequencies that can be used for leisure radios such as, Motorola talkabout, Binatone and Cobra radios. However, there are eight PMR466 frequencies or PMR466 channels that can be used. The spacing between each of these frequencies is 12.5 kHz. As the system name suggests, PMR446 frequencies are located around 446MHz and are in the UHF segment of the radio range. Even though they are not necessarily authorized, PMR446 frequencies are harmonized for use across European countries. High level use of PMR446 frequencies may result in some annoying problems. However, these can be reduced or rectified by changing the frequency of the PMR446. Other systems such as DCS codes and CTCSS tone can as well help in alleviating the problems. In view of the possible high use of the frequencies and the PMR446âs unlicensed nature, the scheme is not appropriate for individuals who need to gain access to frequencies at specific times and locations or for life use. These are simple, short-range walkie talkies that conform to the European Union-wide PMR446 standard and can be used by any person in the United Kingdom or European Union without a license. These types of radios are commonly sold in High-Street shops as well as in most radio outlets. Commonly known as "PMR446sâ radios that meet these standards usually have a power output of 0.5watts, meaning that their range is lower compared to the powerful business walkie talkies that are a licensed and which feature power outputs of 4-5 watts. All of them make use of the same eight channels and this causes problems sometimes if a given area has a lot of radio users using these channels. Licensed Walkie Talkies Two Way Radio for Business Licensed handheld walkie talkies can have a power output of 5 watts, but "license free" PMR446 walkie talkies can only have 0.5watt power output. Therefore, the licensed walkie talkies usually have a better signal penetration and better range in buildings. A majority of businesses prefer using a licensed 2-way walkie talkie system because, in spite of the benefits of license free walkie talkies (PMR 446), they have some downsides (like lower power, a short range and interference) which make them less effective than licensed business radio systems. Taxi as well as other transport companies, and large sites like factories or hospitals, and businesses situated in a number of different locations are excellent examples of circumstances where a licensed radio system may be a favored option. These situations require more powerful radios as opposed to hand-held portable walkie talkies with low frequencies. If the system of your radio relies on vehicle-mounted radios or a base station, a licensed radio system is necessary. Ofcom If you want start using a radio system in your business, then you will have to get a license from Ofcom. In other words, Ofcom is a company that controls who can transmit on what frequency and where, to ensure that different users donât interfere with each other. Business radio system users range from factories and taxi companies, to industrial sites, hospitals, transport operators and care homes. To begin Ofcomâs licensing process there are a number of requirements that a business must first of all fulfil. Ofcom license is especially important regarding official radio users like police, military, railways, air traffic control and emergency services, railways, etc. Radio systems that meet specific standards can be used without any license from Ofcom. For many walkie talkie users, license free radios will be okay. And if you are in need of a license, it isnât that expensive or complicated to get one. The UK simple license is a license issued by Ofcom and gives holders the right to use more powerful radios. It is effectively a license to use powerful radios any place in the UK, using give frequencies which are shared by anyone using this license. This license is easy and quick to apply for, costs about £75 per organization, and is valid for 5 years. It is the only option for people who need to use their radio systems anywhere in the United Kingdom, and is ideal for most business radios users. Geographic License This license provides you with specific frequencies or frequency allocated just for your organizationâs use within a given geographical area. The cost of the license varies from moderately cheap in most locations in the UK (about £100 annually), with the cost heightening in key cities, more so London, where the demand for radio frequencies is very high, going for up to more than £500 per year. Radios that are designed to use dedicated frequencies such as this, should not be used outside of the licensed area, since the same frequency will possibly have been assigned to somebody else and you will therefore be causing interference to them. UK Business Radio Suppliers License This is a license for hire companies and radio equipment suppliers. It allows these companies to do short term radio hire via a set of frequencies allotted to radio hire companies. It also allows these companies to provide âdemoâ radio systems to potential customers and to undertake repairs to radio systems. When these companies hire out their radio equipment, itâs hired using this license, so that the person hiring it does need to worry about licensing issues. Summary The importance of walkie talkies and radios in the UK and other parts of the world cannot be overlooked. Not only are these gadgets important in everyday communication, but they continue to play a very crucial role in the development of other communication tools. A lot of useful information about radios and walkie talkies has been highlighted in this article for the benefit of radio users and the public in general. Every time a singer gets on stage, he or she wants to put on his/her best performance ever. This is why he/she will try to avoid any distraction that might otherwise affect his or her performance in a negative way. They will ensure that their concentration is really high and that they can hear themselves sing during that moment. One of the distractions that is usually in almost every concert is noise. The noise can be coming from the speakers, the echoes and even form the audience itself.
The music and the song that is normally heard when a singer is performing is referred to as house mix while the song that the singer hears from the speakers is referred to as monitor mix. Usually, a singer stands at the back of the main speakers that are normally placed in front of the audience. Most of the time especially on a big stage, the song that reaches the audience is reflected back to the stage (but not immediately). Such background music will prevent the singer from hearing his or her voice. Stage monitors are small speakers that are directly aimed at the singer for him or her to hear himself or herself sing. Stage monitors were previously used in concerts and they are still being used on some small venues where cover bands do gigs e.g. in some private parties, bars etc. In the current concert venues, stage monitors do not work very well. This is because singers and musicians move a lot on stage when they are performing. Although the stage monitors enable the singer to hear the music on the stage, they are not as clear as personal monitors (referred to as earpieces, very different to Radio Earpieces). Earpieces give the singer a detailed information regarding his or her performance. They make him/her hear both the song and the orchestra. They enable the singer to constantly hear his/her song regardless of his or her physical movement on the stage. This is unlike the stage monitors that usually provide the bandâs and the singerâs voice based on their distance from the speaker. With stage monitors, the sounds usually vary especially if the singer is moving all over the stage. When a singer has the earpieces on, he gets to choose what he wants to hear. For instance if he wants to hear himself sing or even hear the lyrics, he can. The earpieces help in drowning out the background sounds like the noises made by the crowd or even those from the band. In fact on average, the earpieces can help the singer reduce the background noise by up to 30 decibels. This can extremely help the singer during the performance. Usually, the earpieces are tailor- made to perfectly fit the singer. They also come in different styles and colors and therefore the singer can pick the one that suits his/her outfit on the stage. The most important benefit of having the earpieces on is that, they help the singer in eliminating or reducing the echoes. In an auditorium specifically built for concerts, sounds usually radiate through the entire building when the singer is performing. The audience really enjoy the music that echoes back to the stage however, the singer can easily get confused with such echoes. Note that, by the time the echo reaches the stage, it will be one or two seconds off from what the singer is singing at that moment. Earpieces also help in blocking the sounds that are coming from the band. The instruments are extremely loud especially those that use electric amplifiers. This noise can make it really hard for the singer to hear himself or herself sing. The earpieces give the singer the sound feedback and therefore he/she is able to hear everything that is in the song. This makes it easier for him/her to keep on with his or her performance. Sometimes, you may notice that some garage bands who work in small areas are not using earpieces. The members of such bands usually monitor one another while performing to ensure that they keep up and stay in tune during the performance. However in large crowds of say a 100000 people (i.e. in huge stadiums), one will definitely need earpieces otherwise he/she may not hear anything and may even end up with off key sounds. ATEX Radios donât get the coverage that they deserve, they are superior to most other radios and are designed for the most dangerous and explosive situations. In the past Motorola have designed ATEX radios on current models and the respective safety features added, but this 8000XE is a new model with features not seen before on previous ATEX radio. Hot off the Motorola News desk, you can find the original article here.
Motorola Solutions continues to design digital radio solutions for firefighters and has added the APX 8000XE two-way radio and APX XE500 RSM to its line of products. The newest entries into Motorola Solutionsâ award-winning APX portfolio of Project 25 (P25) digital radios have been developed using the companyâs well-established practice of hands-on research with firefighters and other first responders who need the most reliable mission-critical communications to do their jobs efficiently, effectively and safely every day. The APX 8000XE features all-band functionality and is a rugged P25 two-way radio that can be used in either analog or digital mode across 700/800 MHz, VHF, and UHF bands. Time is of the essence for firefighters and they can be ready in moments by programming the radio remotely via WiFi and radio management software to operate securely on different radio networks, allowing them to quickly help neighboring counties during large-scale emergencies. Motorola Solutions works closely with firefighters and other radio users to find out exactly what they need, and the APX 8000XE is the latest example of that thinking. It features the trusted ergonomics of the APX XE radio series, designed for easy operation in harsh conditions. The right-sized radio has a large top display, exaggerated controls for gloved hands, and a dedicated push-to-talk button. It also provides best-in-class audio with a 1-watt speaker, three built-in microphones and automatic noise suppression for clarity in the loudest of environments. âThe APX 8000XE is an all-band rugged and submersible portable radio made for firefighters,â said Lieutenant David Hudik, Elgin Fire Department. âWith Wi-Fi access, we can reprogram the APX 8000XE on the fly when we are providing mutual aid assistance out-of-state.â Most firefighters use a remote speaker microphone with their radios and the APX XE500 RSM is designedspecifically for demanding environments, whether combating a fire or providing medical services at the scene of an accident: With five strategically placed microphones and automatic noise suppression, the APX XE500  provides clear communications when worn on either shoulder, center chest, or over the shoulder. It can be submersed in two meters of water for up to 4 hours. It withstands heat conditions of up to 500°F (260°C) for up to five minutes. A channel knob automatically controls the channels of the userâs portable APX radio. âWith the APX XE500 RSM, I can completely control my APX radio without having to hunt under my bunker coat for it,â said Lieutenant David Hudik, Elgin Fire Department. âWith improved water porting, you can carry the APX XE500 upright or upside down for fast water drainage while maintaining clear voicecommunications.â âCustomer input is essential to our design and the Elgin Fire Department was right at our side as we tested the capabilities of the APX 8000XE and APX XE500 RSM,â said Claudia Rodriguez, vice president, Devices Product Management, Motorola Solutions. âThe latest XE radio means firefighters will be able to talk with other first responders at the scene and across municipalities and regions. The new rugged RSM means they can communicate clearly in the loudest fireground environments, including blaring horns and wailing sirens.â The APX 8000XE and XE500 RSM will be available in North America. Motorola Solutions are busy re-modelling their business at the moment and are under pressure from many other radio manufacturers, that are stealing away their market share. They are moving towards creating equipment that can use the LTE, essentially competing with the mobile phone market. This will be seen by many as a move away from the essence of two way radios, but it is an inevitable progression. This new radio will use current motorola accessories, chargers and batteries. We brought you this article from the urgentcomms websites
Motorola Solutions today will unveil a new P25 mobile radio that operates on its ASTRO 25 systems and will highlight key features enabled by the 7.17 release of ASTRO 25 software today at APCO 2016. One of the key features of the APX 8500 all-band mobile radio is its ability to leverage LTE connectivity from a VML750 modem installed in the public-safety vehicle, if the ASTRO 25 data capability is interrupted by continuous voice transmissions during a busy incident, according to Anatoly Delm, Motorola Solutionsâ director of global infrastructure marketing. âLetâs say that you have a major incident, everybodyâs talking all the time and the ASTRO network is being used all the time, it can [offload] some of the data communications, like GPS, to broadbandâpublic-safety LTE or commercial LTE, depending on what the modem is operating on,â Delm said during an interview with IWCEâs Urgent Communications. âSo, youâve got this combination of the best of both worlds, where your voice communications are continuing over the ASTRO network, and your data communicationsâif the ASTRO network is too busy, because of a major incidentâcan be carried on by an LTE network from the same car.â Meanwhile, the 7.17 release of ASTRO 25 software will provide system users and operators with features that are designed to improve the reliability and usability of the P25 network, Delm said. One enhancement is a more efficient way to execute over-the-air software updates, Delm said. âOrdinarily, what happens is that the software update has to travel to one radio at a time. If youâve got a large enough fleet, it could take days or possibly weeks [to complete the software update for all radios],â he said. âIn this case, the software is being continuously broadcast, kind of like on repeat. In the meantime, all of the radios continue to function as normalâyou can talk on them, and none of the functions are disrupted. âOnce a radio has received all of the packets that it needs, it can then give the user the [a notification] that the update is ready and asks whether the user wants to install it. If they say âYes,â then the radio is updated. This means you can reduce your update time to maybe a few hours, depending on the size of your fleet. But you certainly donât have to do it one at a time.â Other new capabilities included in the latest ASTRO 25 software release include personnel accountabilityâoften used for roll-call functionality on a fireground or other incident sceneâover trunked systems, Delm said. Previously, this capability existed only in conventional mode. Closed Back Headphones vs. Open-back Headphones
Open-back headphones have pads which rest on the outer ear. They're designed such that the outer shell of the ear cup has perforations usually with horizontal cutouts. The Open back headphones design of the ear cup enhances better natural sound because of less coloration as compared to the Closed back headphones. Closed back headphones have much larger earpads which encircle the ears. They are designed such that there's a big pad which cups the ears, and it features an insulated outer shell of plastic which covers the ears. The Closed back headphones actually have a very solid outer shell which doesn't have any sort of perforations such that the outer shell effectively cups/encircles the entire ear. The Closed back headphones are excellent at isolating noise. They block most of the ambient noise, but they've a smaller sound stage, which gives the user the perception that the audio/sound is originating from within their head. Closed back headphones also tend to produce much stronger low frequencies as compared to Open back headphones. Low Impedance vs High Impedance Headphones normally come in various different impedance levels, such as 8 ohms, 16 ohms and 32 ohms. The power that's supplied by an audio source may be at varying levels because of a variety of factors including being limited because of being battery powered. Generally, as the impedance of the headphones increases, much more voltage will be required in order to drive it, and the audio loudness of headphones for a particular voltage decreases. The determination of impedance is usually disregarded by many headphone buyers, however, the truth is it's one of the most important factors to consider when choosing the best headphones for your particular needs. Impedance is basically just how much power the headphones can put out so that it can overcome resistance to move the headphones' diaphragm. Low impedance headphones (that is, less than 25 ohm), usually require little power in order to deliver high audio levels. Low Impedance headphones play well with devices which have weak amplification. These can include; mobile phones, portable music players and various other portable devices. This type of headphones can be used at home and also while jogging with your mobile phone; this is one of the reasons why most of the on-, in-, and over the ear headphones, are low impedance. Low impedance headphones are normally designed to get plugged directly in to a single (one) source, and generates sound more efficiently from a lower level input signal. This headphones tend to be much louder and much more efficient, however, they will also require a much more capable amplifier. High impedance headphones (25 ohms and above), generally require more power in order to deliver high audio levels. As a result, they're protected from damages caused by overloading. High impedance headphones are typically designed for studio like applications where there might be multiple phones/devices wired in parallel and receiving input signals from a single source. High impedance headphones are more tolerant of the amplifier limitations, however, they will produce less volume for a particular output level. They are also a little more durable (that is, electronically), however, they require much higher signal levels in order to produce the same level of output level of the low impedance headphones. This type of headphones can be used with a wider range of audio equipment. Passive Headphones vs. Active Headphones Passive (noise cancelling) headphones are made of materials which help in blocking out sound waves from the surrounding environment. The same way ear muffs soften the outside noise, so does this type of headphones employ passive noise canceling. This type of headphones are typically used for both professional mixing and monitoring, like in broadcast and recording studios, and such other applications. Passive headphones are basically designed to playback music/audio true to the actual original recording, with minimal, compression, EQ, and such other sound enhancements. On the other hand, Active headphones use batteries in order to power the built in Digital Signal Processing (also abbreviated as DSP) technology which processes play back for a particular reason, for example, to enhance the bass and the high end. Due to the enhancement of playbacks with sharper high ends and more bass, active headphones are more popular for general listening and listening to music for pleasure. Active noise cancelling headphones are also made of materials which help in blocking out outside noise, however, they take things a step further by making their very own sound waves; the sound waves created mimic the outside noises, but are a mirror image of each other, thus cancels each other out. Wired Headphones Vs Wireless Headphones When choosing a pair of headphones, deciding between wireless vs. wired is among one of the most overlooked factors. Wireless headphones might be a more popular choice, however, the wired headphones also have their own set of benefits. Well, that being said, as a general rule of thumb, between wireless headphones and wired headphones, assuming a similar price between the models; the wired headphones usually offer a much better quality. Also, the audio quality may get compromised over Bluetooth. You can opt for the wireless headphones if you are not much of an audiophile, and you tend to travel a lot. If you really don't like getting the cables of your headphones getting tangled, or caught while listening to music/audio, then the choice should be rather simple; go for wireless headphones. You can opt for the wired headphones if you are an audiophile, and you do not necessarily bother with the wireless options unless absolutely essential like using them when traveling, or keeping the headphones as a backup. As aforementioned, the wired headphones are way ahead in terms of output quality as compared to the wireless headphones. You will never have to worry about running out of batteries, unless you happen to opt for wired headphones which cancel noise. In addition, you will never suffer from interference from the other commonly used wireless electronic devices. However, you will need to take good care of the wired headphone cables, or they will eventually break. In the world today, walkie-talkies are very important tools. From security services, construction sites, camping sites to use during emergency rescue missions, they are a vital part of the communication industry. In the past, walkie-talkie users walked around talking and listening directly from the big phonesâ but with the advancement of technology, walkie-talkie accessories have made it possible to seamlessly communicate using earpieces and headphones connected to the walkie-talkie while it remains strapped to the belt. At EarpieceOnline.co.uk we have a wide range of top quality walkie-talkie and radio accessories to help ease communication with workmates.
Using a radio earpiece for a walkie-talkie is very convenient and it simplifies the communication by a mile. Radio earpieces and headsets help in remaining discrete and offer clearer communications. This feature is important especially for police and security agents looking to conduct investigations and surveillance unnoticed. The push to talk features make it easy to walk around while communicating. Radio  earpieces help in noise cancellation enabling loud and clear communication. When looking to buy a good radio earpiece, other than considering your budget, itâs important to consider the comfort and ease of use of the earpiece. EarpieceOnline, they have the best Radio Earpieces and Connectors together with many other Radio accessories. They have high quality Radio Earpiece Styles that guarantee to suit your working needs. Below are some of the top Earpiece Accessories, Connectors and Earpiece styles available in the Online store; Earpieces EarpieceOnline.co.uk, have the best earpieces both wireless and wired. These earpieces can be used together with all the leading 2 way Radio Brands like Motorola, Kenwood, Entel, Hytera and Icom. Their earpieces are very small, light and comfortable to wear. The small invisible earpieces will help provide clear and covert conversations. Your information is secure with these small masterpieces and no one will even realise that you are on radio communication. They also have different styles of earpieces available in store. With D shaped earpieces, C shaped earpieces, acoustic tube (2 wire and 3wire) and bone conductors. It is upon the customer to make the choice for the most appropriate earpiece suited for his/her needs. Here are some of the available earpiece types in the store; High quality 3 wire covert earpieces, earpieces adaptors, in ear moulds and mushroom replacements for acoustic tube earpieces. The 3 wire covert earpiece kits available in our store include; The Covert Motorola Block connector earpiece, Covert Motorola 2 Pin connector earpieces, The Covert Kenwood 2 Pin connector earpiece and Icom Multipin connector earpiece. These earpieces can be used with most of the leading Radio brands in the market. These acoustic tube earpieces are made from very durable materials with Kevlar cable reinforcement. The connecting wires to these connectors are long enough giving you freedom to walk around comfortably. They further have Noise reducing microphones, push to talk buttons and are all RoHS compliant. The features might slightly vary depending on the brand of earpiece you prefer. We also have wireless kits to further make your communications discrete and easier. These kits are very small, light and easy to use. The inductive pack of the kit is attached to the collar of a shirt or inside a jacket and it then transmits audio signals to the in-ear wireless earpiece. A small push to talk button is concealed in the userâs wrist where the user will be talking to. The available wireless kits in EarpieceOnline .co.uk include; Inductive wireless flat pack with its in-ear wireless earpiece and the Neck Loop Inductor Earpiece with an In âEar wireless receiver. All these earpieces come with well-designed mushroom replacements. Connectors Different radios have different connection ports. At EarpieceOnline.co.uk, they have a range of earpiece radio connectors to connect earpieces/headsets to all the leading radio brands like Motorola, Kenwood and Icom. Whereas other connectors are tailored to specific brands, some are universal and will be used to connect more than one 2 way radios. Some of the available connectors at EarpieceOnline.co.ukinclude; interchangeable universal connectors- this connectors allow you to interchange between different radios like the Motorola GP340, GP344, GP360, DP3400, DP2400, all Icom, Hytera and Kenwood radios. We also have replacement connectors that are used to replace specific connectors. They include; DP2400 replacement connectors, Entel Multi-pin Connectors, GP340 Connectors and many other individual brands. Be sure to check with us for your desired connectors. Why shop with us EarpieceOnline.co.uk have a large team of experienced professionals to help you with choosing and buying 2 way radios and accessories. We sell high quality products which meet the required standards to satisfy our customers. Our prices are very affordable considering the durable and the quality of the products that we offer. Our customers enjoy very fast responses to queries and we deliver the purchased items quickly. Visit our online store at EarpieceOnlinetoday and get high quality products to suit your business. If you are looking for the best 2 way radios, earpieces, connectors, adaptors and many other communication accessories then EarpieceOnline is your perfect spot to shop. It is understood that ear moulded plugs are far more comfortable and effective than the mushroom plugs, but which ones are the best? The Custom fit or generic fit. This article runs over the positives and negatives of that question and comes to a conclusion, if your debating to get some moulded ear plugs or some from the shelf, you will want to read this first.
Over the past 20 years, In Ear Monitors (or IEMs) have become a near-necessity for live performance. In years prior, engineers would inevitably have to crank up a venueâs stage monitors loud enough for the musicians to hear themselves over the audience, over the sound coming from the stage, and over the main mix. This would often lead to an arms race of ever-increasing stage volume, potentially causing feedback issues and compromises in clarity and quality for the live mix. Custom in-ear monitors from JH Audio, one of the first commercial brands to make a name for itself in the IEM market. With the advent of in-ear monitors, all this began to change. In the mid-1980s, Etymotic developed the first-ever insert-style earphones, and soon after, a designer named Marty Garcia began making one-off custom in-ears for rock stars like Todd Rundgren. By 1995, Jerry Harvey, founder of Ultimate Earsand JH Audio, brought some of the first commercially-available dual-driver IEMs to market. All of a sudden, everyday musicians had an option that allowed us to save our hearing, get better monitor mixes, and dramatically reduce the chances of feedback onstage. Today, IEMs are increasingly being considered useful tools for the studio as well. Their ability to prevent sound leakage can be of tremendous value in helping to control click and instrument bleed, and in saving musiciansâ hearing by allowing them to monitor at lower levels. Some musicians and engineers, such as drummer Rich Pagano of The Fab Faux, will use IEMs to quickly check for phase when micâing up a drum kit, while others turn to IEMs as a kind of audio microscope, using them to help check for and remove extraneous low-level noise. Any modern musician would be wise to consider adding in-ear monitors to their toolkit. But is it worth it to dish out the extra money on custom fit IEMs, instead of saving some money with the generic fit ones? In testing a variety of in-ear monitors from brands like Westone, Ultimate Ears, Future Sonics, and even Skullcandy (that last of which is not recommended for professional use), I have found that there are cases in which generic fit earphones may work better than their custom counterparts. Making the right decision for your needs comes down to considering the following four factors: 1) Cost Ultimate Ears custom fit in-ear monitors. Custom fit IEMs tend to cost more than generic fit ones, as it takes more time and effort for the manufacturer to craft a product designed specifically for the unique anatomy of your ear. Getting custom IEMs made also requires that you go to an audiologist to make a mold of your ear canal that the IEM company can then use to make your monitors fit as well as possible. Take note of both of these costs, which can range from $100-$200 or more for a fitting from an audiologist, and $299-$1499 or more for the custom monitors to be made. 2) Comfort & Seal Custom fit IEMs are custom, so they should feel really comfortable, right?  Well, yes and no. In my experience, custom fit IEMs can feel a little tight in the ear canal compared to generics, especially at first. Hearing so little acoustic feedback from your performance can also take some getting used to, and the tight seal of custom fit in-ears can feel particularly awkward when signing. Because of this, my looser-fitting Westone 3 generic IEMs actually feel more comfortable to me on vocal duties, so I often find myself using them over my custom fit Future Sonics when I step up to the mic. Matt Bellamy from Muse (recently featured in Get THAT Guitar Tone) has been seen using both customUltimate Ears UE-11s and generic-fit Westone UM2s when on tour, and my guess is that he has similar reasons. Though the tight fit of custom IEMs and lack of acoustic feedback from your performance can be a challenge, itâs worth noting that generic foam-tip IEMs also provide their own tradeoffs: The looser fit of generics can sometimes create a bit of a tingling or âticklingâ feeling in your ear when playing at higher volumes, so it may be useful to have a pair of each and go with what feels best depending on the date and venue. Silicone-based Encore Studio custom IEMs from ACS. Another option here is the custom fit brandACS, which makes its IEMs out of soft silicone shells. This softer silicone-based design is meant to offer both better comfort and a tighter fit than the hard acrylic shells used by brands like Westone and Ultimate Ears. Though these silicone monitors sell for a premium price of $400-$1,200 and up, they may help bridge the gap between the tight seal of custom acrylics and the looser and easier fit of foam-tipped generic IEMs. 3) Hearing Protection In addition to cutting down on sound leakage to help improve sound quality and reduce feedback, another primary benefit of IEMs is that they can offer considerable hearing protection by helping to block out exterior noise, allowing you to monitor at lower levels. Some of the best custom fit brands like JH Audio and Ultimate Ears offer NRR ratings of 26dB in reduction, and some of the better generic brands advertise comparable results as well. (Though your results with generics may vary depending on the fit and seal in your ear.) In the long term, reducing the levels youâre regularly exposed toâeven by a few extra decibelsâcould mean the difference between a long and illustrious career as a âgolden-earedâ audio engineer and potentialtinnitus and irreversible hearing loss. Also worth checking out is the REV33 system, which can be added on to your your in-ear-monitoring system to help reduce distortion and ear strain. Many live musicians, including Phil X and Steve Salas swear by the system. According to the company: âAll in-ear monitors and headphones generate damaging, unwanted noise and distortion that forces the ear to shut down and compress for protection. The REV33 reduces the symptoms of tinnitus, ear-ringing, ear-fatigue, buzzing and dampened hearing by preventing in-ear monitors and headphones from producing this unwanted noise and distortion.â 4) Waiting and Time Considerations After getting my first pair of IEMâs made, I found that the right ear monitor turned out well, but I was not getting a proper seal in the left ear at first. This made the monitors essentially useless for my live sound needs at the time, and so I had to send them back for some tweaking. When I got them back a couple of weeks later, the seal still wasnât great, so I had to send them back once again for further modification, and visit my audiologist a second time to take another impression of my ear canal to send in. Getting the perfect fit turned out to be quite a time-consuming process (as well as an expensive one) so unless youâre on the hunt for a long-term solution with as much acoustic isolation as humanly possible, you might satisfice with generic IEMs, or keep some around as an alternate option. In that case, I would recommend the generic in-ears from Ultimate Ears, Shure, or Westone. Ultimate Earsâ generic fit UE900 model sports 4 drivers for $400. The Ultimate Ears UE900âs are a great sounding 4-driver IEM that only costs $399, while the $99 Shure SE215 single-driver IEMs advertise an astonishing 37dB of noise reduction (more than most custom IEMs) at a great price. My own triple-driver Westone 3âs (since replaced by the W30 model) are the most comfortable in ear monitors I own right now, and they isolate a lot more noise than most thanks to their foam-tip construction. Compared to custom in-ears, any of these model can potentially save you time and money, or work as a welcome supplement for those times when the tight fit of custom in-ears feels irksome. I hope my experiences here help you make the right decision when you go to buy your own IEMs. In short, I found that less-expensive generic foam-tipped IEMs worked better for me in many situations, and the savings enabled me to spend my money on better drivers with a fuller sound. If youâve used IEMâs in the past, let us know in the comments below whether you prefer custom fits or generic fit ones, and why. Have you ever stopped to think where headsets really came from? Well, they first headset was used in the 20th century; however, the technology has significantly improved over the decades. Shockingly it did not occur to anyone that headsets could be used to listening music on devices. Read more about the invention of radio headset in this article.
Everyone Uses HeadsetsHeadsets are an important accessory and it is very clear that they have indeed managed to save an argument over the years. Headsets enable you to listen to audio/music without having to get in the way of anyone else. In this time and age, we use all types of headsets from tiny earplugs with a wireless Bluetooth technology for listening to music in the streets, to big leather-padded cans to listen to music at home. Gaming headsets are increasingly becoming popular as many of them today come outfitted with a microphone, hence allowing the users to speak with other relatives, gamers and friends. Headsets can give the user a great sound quality, there isnât any sort of interruption between the ear and the sound, external sound is blocked out and there is absolutely nowhere for it to dissipate, more so if you invest in a pair of high quality headsets which are plentifully available nowadays. As a matter of fact, if you take a walk back to the early 20th century right before amplifiers had been invented; sensitive headsets were the only means that was could be used to listen to music/audio. What Year Was The First Radio Headset Invented?Accurately speaking, the very first headset dates back to the telephone early adoption and by 1920 radio headsets were being commercially manufactured. These were mainly used by professionals and not by the public. There exists an argument over who was first person behind the idea to dwindle down loudspeakers and move on to attach them on our heads but the earliest living example dates back to around 1911. This was far from the headsets we use presently with no padding for comfort and a very low sound quality. They were used by telephone exchanges and radio operators. Who Invented The Radio Headset?Headsets were the only way to listen to audio files before the development of amplifiers. Headsets were invented in 1910 by Nathaniel Baldwin, an American born to a Canadian father and an American mother. Baldwin developed the first, truly successful set in 1910 by hand in his kitchen and later sold them to US Navy. Baldwinâs headsets made use of moving iron drivers that came with either balanced or single ended armatures. The requirement for high-sensitivity meant damping could not be used, and hence they had a crude sound quality. These early models did not have padding, and oftentimes ended up producing excessive clamping force on the heads of persons wearing them. In 1944, John C. Koss a jazz musician and an audiophile from Milwaukee, US, designed the first stereo headset. Previously, headsets were used only by radio and telephone operators, as well as persons in related industries. The 3.5-mm phone connector and radio headset, which is commonly used in portable applications today, has been in use since the Sony EFM117J radio that was released in 1965. Cancer affects millions of lives, possibly even more. Everybody knows somebody that has been forever hurt, either physically or emotionally, by this vicious, unforgiving ailment. Most of us know somebody who has lost their life to the disease.
Despite this, cancer survival rates are higher than ever before. In recent years, cancer treatment has improved rapidly, but a complete cure has always appeared to be just beyond reach, a tantalising Holy Grail of medical science. This month, however, an announcement was made that could have the potential to end all that. The good news is that human trials could begin in as little as four years’ time. If those trials prove to be successful, then science will have made a major stride towards eradicating the disease completely. A joint Dutch/Canadian team stumbled across this miraculous discovery whilst searching for ways to treat malaria in pregnant women. According to the team, the carbohydrate that malaria attacks in the placenta is exactly the same as a carbohydrate present in cancer cells. As Metro.co.uk reports, Ali Salanti from the University of Copenhagen said, “for decades, scientists have been searching for similarities between the growth of a placenta and a tumor (...) The placenta is an organ, which within a few months grows from only few cells into an organ weighing approx. two pounds, and it provides the embryo with oxygen and nourishment in a relatively foreign environment. (...) In a manner of speaking, tumors do much the same, they grow aggressively in a relatively foreign environment.” Intrigued by this idea, the team tailored a special malaria protein to include a toxin designed to target cancerous cells. The cancer cells absorb the protein and are then in turn killed by the malaria virus. Theoretically, this idea is sound and experiments on mice with cancer have already begun. It’s definitely early days yet, but the team are hopeful that this innovative new treatment could provide scientists with a valuable weapon in the fight against cancer. If the trials are successful, the potential benefits are simply staggering to consider. It just goes to show that no dream is too big to accomplish, provided we never stop believing that it’s possible. Imagine a world without cancer and perhaps, in time, we won’t have to. |
AuthorI'm Armando and i'm a very shy person, this is a website that allows me to express myself. |