Frequency modulation

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The Audio Signal (top) is transmitted on a carrier wave by modifying the amplitude (middle) or frequency (bottom)

Frequency modulation (FM) is a signaling method that varies the carrier frequency in proportion to the amplitude of the modulating signal.

Frequency modulation is most commonly used in radio, amateur radio, radar, telemetry, seismic prospecting, and in the monitoring of newborns for seizures via EEG.[1]

See also

Further reading

External links


  1. B. Boashash, editor, “Time-Frequency Signal Analysis and Processing – A Comprehensive Reference”, Elsevier Science, Oxford, 2003; ISBN 0-08-044335-4