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Radio stations in United States have evolved since their early twentieth-century origins. In 1920 8MK started operations in Detroit; after it, thousands of private and public radio have operated in the United States.
Radio broadcasting has been used in the United States since the early 1920s to distribute news and entertainment to a national audience. In 1923, 1 percent of U.S. households owned at least one radio receiver, while a majority did by 1931 and 75 percent did by 1937. [1] [2] It was the first electronic "mass medium" technology, and its ...
Radio broadcasting is the broadcasting of audio (sound), sometimes with related metadata, by radio waves to radio receivers belonging to a public audience. In terrestrial radio broadcasting the radio waves are broadcast by a land-based radio station, while in satellite radio the radio waves are broadcast by a satellite in Earth orbit.
An antenna farm hosting various radio antennas on Sandia Peak near Albuquerque, New Mexico, US. Radio is the technology of communicating using radio waves. [1] [2] [3] Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an ...
NPO. Huizen (transmitter), Hilversum (studio), Netherlands. 1927, from 1930 part of Dutch Public radio. AM 160 kHz,1935 transmitter moved to Kootwijk, 1938 also Jaarsveld 722 kHz, today FM network and 747/1251 kHz. Huizen 15 kW, Kootwijk day 15 kW, evening 120 kW, Jaarsveld 20 kW.
History of radio. The early history of radio is the history of technology that produces and uses radio instruments that use radio waves. Within the timeline of radio, many people contributed theory and inventions in what became radio. Radio development began as "wireless telegraphy".
List of NPR stations. The following is a list of full-power non-commercial educational radio stations in the United States broadcasting programming from National Public Radio (NPR), which can be sorted by their call signs, frequencies, band, city of license and state. HD Radio subchannels and low-power translators are not included.
RTÉ Radio 1 (current affairs and speech based broadcasting); RTÉ 2fm (rock and pop music station); RTÉ lyric fm (classical music plus jazz, world music and arts); RTÉ Raidió na Gaeltachta (the Irish language station targeted at the Gaeltacht, and the Irish language-speaking community of Ireland)