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2. Remote control - Wikipedia

   en.wikipedia.org/wiki/Remote_control

   In 1980, the most popular remote control was the Starcom Cable TV Converter (from Jerrold Electronics, a division of General Instrument) [15] which used 40-kHz sound to change channels. Then, a Canadian company, Viewstar, Inc., was formed by engineer Paul Hrivnak and started producing a cable TV converter with an infrared remote control.

3. 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 ...

4. Line-of-sight propagation - Wikipedia

   en.wikipedia.org/wiki/Line-of-sight_propagation

   Line-of-sight propagation is a characteristic of electromagnetic radiation or acoustic wave propagation which means waves can only travel in a direct visual path from the source to the receiver without obstacles. [ 1] Electromagnetic transmission includes light emissions traveling in a straight line. The rays or waves may be diffracted ...

5. Transmitter - Wikipedia

   en.wikipedia.org/wiki/Transmitter

   Commercial FM broadcasting transmitter at radio station WDET-FM, Wayne State University, Detroit, US.It broadcasts at 101.9 MHz with a radiated power of 48 kW.. In electronics and telecommunications, a radio transmitter or just transmitter (often abbreviated as XMTR or TX in technical documents) is an electronic device which produces radio waves with an antenna with the purpose of signal ...

6. Very high frequency - Wikipedia

   en.wikipedia.org/wiki/Very_high_frequency

   VI. v. t. e. Very high frequency ( VHF) is the ITU designation [1] for the range of radio frequency electromagnetic waves ( radio waves) from 30 to 300 megahertz (MHz), with corresponding wavelengths of ten meters to one meter. Frequencies immediately below VHF are denoted high frequency (HF), and the next higher frequencies are known as ultra ...

7. The 8 best OTC hearing aids for seniors, according to ... - AOL

   www.aol.com/lifestyle/best-otc-hearing-aids...

   Best sound quality. $1,098 at Amazon. Audien ATOM PRO 2. Best ease of use. $289 at Amazon. See 3 more. While there is no way to reverse hearing loss, hearing aids can still enhance our everyday ...

8. Radio wave - Wikipedia

   en.wikipedia.org/wiki/Radio_wave

   Like all electromagnetic waves, radio waves in a vacuum travel at the speed of light, and in the Earth's atmosphere at a slightly slower speed. Radio waves are generated by charged particles undergoing acceleration, such as time-varying electric currents. [ 1] Naturally occurring radio waves are emitted by lightning and astronomical objects ...

9. The best soundbars for your TV in 2024: No more ... - AOL

   www.aol.com/lifestyle/best-soundbars-for-tv...

   Best affordable Dolby Atmos soundbar. $499 at Amazon. More options. Sonos Arc Premium Smart Soundbar. Best smart soundbar. $887 at Amazon. See 2 more. As a technology journalist with over 30 years ...