Radio transmission of audio by frequency modulation
AM and FM modulated signals for radio. AM (amplitude modulation) and FM (frequency modulation) are types of modulation (coding). The sound of the program material, usually coming from a radio studio, is used to modulate (vary) a carrier wave of a specific frequency, then broadcast. In AM broadcasting, the amplitude of the carrier wave is modulated to encode the original sound. In FM broadcasting, the frequency of the carrier wave is modulated to encode the sound. A radio receiver extracts the original program sound from the modulated radio signal and reproduces the sound in a loudspeaker.Position of FM radio in the electromagnetic spectrumA commercial 35 kW FM radio transmitter built in the late 1980s. It belongs to FM radio station KWNR, in Henderson, Nevada, and broadcasts at 95.5 MHz.
FM broadcasting is a method of radio broadcasting that uses frequency modulation (FM) of the radio broadcast carrier wave. Invented in 1933 by American engineer Edwin Armstrong, wide-band FM is used worldwide to transmit high-fidelity sound over broadcast radio. FM broadcasting offers higher fidelity—more accurate reproduction of the original program sound—than other broadcasting techniques, such as AM broadcasting. It is also less susceptible to common forms of interference, having less static and popping sounds than are often heard on AM. Therefore, FM is used for most broadcasts of music and general audio (in the audio spectrum). FM radio stations use the very high frequency range of radio frequencies.
FMbroadcasting is a method of radio broadcasting that uses frequency modulation (FM) of the radio broadcast carrier wave. Invented in 1933 by American...
include AM and FM stations. There are several subtypes, namely commercial broadcasting, non-commercial educational (NCE) public broadcasting and non-profit...
FM sound broadcasting began in the United Kingdom on 2 May 1955 when the BBC started an FMbroadcasting service the Light Programme, the Third Programme...
FMbroadcasting in the United States began in the 1930s at engineer and inventor Edwin Howard Armstrong's experimental station, W2XMN. The use of FM radio...
platform and brings 85 percent energy consumption savings compared to FMbroadcasting (but analog tuners are more efficient than digital ones and DRM+ has...
The FM broadcast band is a range of radio frequencies used for FMbroadcasting by radio stations. The range of frequencies used differs between different...
communication, radio navigation, and radar. Development of stereo FMbroadcasting of radio began in the 1930s in the United States and the 1970s in the...
of FMbroadcasting started just after World War II ended, but the experimental FM network did not begin until the 1960s. The Canadian Broadcasting Corporation's...
audiences declined greatly due to competition from FM (frequency modulation) radio, Digital Audio Broadcasting (DAB), satellite radio, HD (digital) radio, Internet...
Radioteletype also uses FSK. Frequency modulation is widely used for FM radio broadcasting. It is also used in telemetry, radar, seismic prospecting, and monitoring...
for ZM and 89 Stereo FM today broadcasts a simulcasted FM version of Newstalk ZB. Radio New Zealand started broadcasting on FM in the early 1980s and...
DZMB (90.7 FM), broadcasting as 90.7 Love Radio, is a radio station owned and operated by MBC Media Group though its licensee Cebu Broadcasting Company....
Television broadcasting began in Delhi in 1959 as part of AIR, but was split off from the radio network as Doordarshan on 1 April 1976. FMbroadcasting began...
FMbroadcasting started in Australian capital cities in 1947 on an "experimental" basis, using a (monaural) ABC national network feed, consisting largely...
now-defunct Kiwi FM was previously Channel Z. The Wolf and Today FM (formerly Magic Talk and Radio Live) were closed. Call signs in New Zealand BrianFM "Channel...
Radio, Yes FM, Easy Rock, and Radyo Natin; operated either directly by MBC Media Group, or through its affiliate-licensees Pacific Broadcasting Systems,...
operation were abolished and radio broadcasting was nationalized ever since. By the early 1990s, Egypt had only 4 FM stations in Greater Cairo (2 in Alexandria)...
Fukui FMBroadcasting Co., Ltd. (福井エフエム放送株式会社, Fukui Efu Emu Hōsō Kabushiki gaisha, literally FM FUKUI) is a radio station in Fukui, Fukui, Japan. It is...
Tokyo FMBroadcasting Co., Ltd. (株式会社エフエム東京, Kabushiki gaisha Efu Emu Tōkyō, literally Stock company FM Tokyo) (abbreviation:TFM) is a radio station in...
DYWF (93.1 FM), broadcasting as FM Radio 93.1, is a radio station owned by Vimcontu Broadcasting Corporation and operated by Philippine Collective Media...
Look up FM or fm in Wiktionary, the free dictionary. FM or Fm may refer to: Frequency modulation, a radio broadcasting technology FMbroadcastingFM broadcast...
station to go on air in the expanded band was Nankai Broadcasting, which began test broadcasts on 91.7 FM on November 3, 2014. Many Japanese radios are designed...
include AM news services and FM 101 (music) and FM 93. Radio Pakistan was originally known as the Pakistan Broadcasting Service at the time of its inception...
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