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  2. TV Ears - Wikipedia

    en.wikipedia.org/wiki/Tv_ears

    Usually battery operated, the wireless headphone system uses digital frequency to operate. Unlike TV Ears, transmitters for wireless headphone systems are typically capable of projecting audio waves to several different headsets at one time. Wireless systems are good for up to 20 meters and for advanced music and in-home movie-watching experiences.

  3. Wireless telegraphy - Wikipedia

    en.wikipedia.org/wiki/Wireless_telegraphy

    Wireless telegraphy. A US Army Signal Corps radio operator in 1943 in New Guinea transmitting by radiotelegraphy. Wireless telegraphy or radiotelegraphy is transmission of text messages by radio waves, analogous to electrical telegraphy using cables. [1] [2] Before about 1910, the term wireless telegraphy was also used for other experimental ...

  4. Television transmitter - Wikipedia

    en.wikipedia.org/wiki/Television_transmitter

    Television transmitter. A television transmitter is a transmitter that is used for terrestrial (over-the-air) television broadcasting. It is an electronic device that radiates radio waves that carry a video signal representing moving images, along with a synchronized audio channel, which is received by television receivers ('televisions' or ...

  5. The best wireless headphones for seniors - AOL

    www.aol.com/lifestyle/best-wireless-headphones...

    Quick Overview. More options. Sony WH-1000XM5 Noise-Cancelling Headphones. Best headphones overall. $259 at Groupon. Soundcore Q30 Hybrid Active Noise-Cancelling Headphones. Best budget headphones ...

  6. Distributed transmission system - Wikipedia

    en.wikipedia.org/.../Distributed_transmission_system

    Distributed transmission system. In North American digital terrestrial television broadcasting, a distributed transmission system ( DTS or DTx) is a form of single-frequency network in which a single broadcast signal is fed via microwave, landline, or communications satellite to multiple synchronised terrestrial radio transmitter sites. The ...

  7. Wireless Set No. 19 - Wikipedia

    en.wikipedia.org/wiki/Wireless_Set_No._19

    Wireless Set No. 19. Wireless Set No. 19 MK II at the Infoage museum. The Wireless Set No. 19 was a Second World War mobile radio transceiver designed for use by armoured troops of the British Army. First introduced in 1940, the No. 19 began to replace the pre-war Wireless Set No. 11. Two modified versions were introduced, Mk. II in 1941 and Mk.

  8. Radio-frequency identification - Wikipedia

    en.wikipedia.org/wiki/Radio-frequency_identification

    An RFID system consists of a tiny radio transponder called a tag, a radio receiver, and a transmitter. When triggered by an electromagnetic interrogation pulse from a nearby RFID reader device, the tag transmits digital data, usually an identifying inventory number , back to the reader.

  9. Wi-Fi - Wikipedia

    en.wikipedia.org/wiki/Wi-Fi

    Wi-Fi (/ ˈ w aɪ f aɪ /) is a family of wireless network protocols based on the IEEE 802.11 family of standards, which are commonly used for local area networking of devices and Internet access, allowing nearby digital devices to exchange data by radio waves.

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