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Naval air traffic controller communicates with aircraft over a two-way radio headset A variety of portable handheld two-way radios for private use. A two-way radio is a radio transceiver (a radio that can both transmit and receive radio waves), which is used for bidirectional person-to-person voice communication with other users with similar radios, [1] in contrast to a broadcast receiver ...
Helly Hansen (HH) is a Norwegian manufacturer and retailer of clothing and sports equipment, owned by the Canadian retail chain Canadian Tire and operated as a subsidiary. Currently headquartered in Oslo , it was previously headquartered in Moss, Norway , from its founding in 1877 until October 2009.
This page was last edited on 14 January 2025, at 15:00 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
A trunked radio system is a two-way radio system that uses a control channel to automatically assign frequency channels to groups of user radios. In a traditional half-duplex land mobile radio system a group of users (a talkgroup ) with mobile and portable two-way radios communicate over a single shared radio channel, with one user at a time ...
Oxygen mask KM-34 for MiG pilots with a throat microphone Throat microphone LA-5 (Soviet Union early 1980s), same model as above A general-purpose throat mic used for two-way radio communications. A throat microphone, also called a laryngophone, is a type of contact microphone that absorbs vibrations directly from the wearer's throat by way of ...
A headset is a combination of headphone and microphone. Headsets connect over a telephone or to a computer , allowing the user to speak and listen while keeping both hands free. They are commonly used in customer service and technical support centers, where employees can converse with customers while typing information into a computer.
A mechanical interlock prevents the transmit button from being pressed until the monitor button is down. This is called "compulsory monitor before transmit". In mobile radios, microphones are stored in a hang-up box. When the microphone is pulled out of the hang-up, the radio reverts to carrier squelch and the selective calling feature is disabled.
A parabolic microphone is a microphone that uses a parabolic reflector to collect and focus sound waves onto a transducer, in much the same way that a parabolic antenna (e.g. satellite dish) does with radio waves. Though they lack high fidelity, parabolic microphones have great sensitivity to sounds coming from one direction, along the axis of ...
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