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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. Wikipedia