Friday, October 28, 2016

What Is A 2 Way Radio Earpiece

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 “Press To transmit” or “push-to-talk” 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

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.


As far as covertness is concerned, communication must definitely be very discreet, whether it’s 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.

That’s 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 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 “push to talk button” 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 “push to talk” 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.

Wednesday, October 12, 2016

What Every Headset Buyer Should Know

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.

Saturday, October 1, 2016

Intel Made A VR Headset And It's Totally Cord-Free

Intel just announced its own virtual reality headset called Project Alloy, a VR competitor to the Oculus Rift,HTC Vive and the forthcoming PlayStation VR headsets. But what separates the Alloy from the pack is that it’s completely wireless (the wire above is for capturing video for the demo) and it should give you complete spatial awareness without all the dongles the Rift and Vive currently require.

It does this using two of Intel’s RealSense cameras to continuously map your environment. It can even map your hands.

Intel calls the idea “Merged Reality”, essentially combining inputs from cameras around your environment into a virtual world. And Intel was able to pack everything â€" the processor, sensors and controllers â€" into one cord-free headset.

During Intel’s demo, however, the RealSense camera didn’t seem quite as fluid as you’d hope, especially if it’s your primary means of reacting to the digital world around you. Intel says that its hardware will be open source in the second half of 2017 (ugh), so the headset won’t be available anytime soon. Intel is also working with Microsoft so Alloy can run Windows Holographic, the software which powers Hololens, according to Microsoft’s Terry Myerson. Microsoft says that Windows Holographic will also be released in an update for all Windows 10 PCs next year.

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