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- Dictionaryfre·quen·cy mod·u·la·tion/ˌfrēkwənsē ˌmäjəˈlāSHən/
noun
- 1. the modulation of a radio or other wave by variation of its frequency, especially to carry an audio signal.
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noun
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Encoding of information in a carrier wave by varying the instantaneous frequency of the wave
Frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. The technology is used in telecommunications, radio broadcasting, signal processing, and computing. In analog frequency modulation, such as radio broadcasting, of an audio signal representing voice or music, the instantaneous frequency deviation, i.e. Wikipedia