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  1. Oxford Dictionary

    frequency modulation

    • n.
      the modulation of a radio or other wave by variation of its frequency, especially to carry an audio signal.

    • noun: frequency modulation

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    frequency modulation

    • IPA[ˌfrēkwənsē ˌmäjəˈlāSHən]

    美式

    • n.
      the modulation of a radio or other wave by variation of its frequency, especially to carry an ...

    Oxford American Dictionary