channel FET microphone

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channel FET microphone [¦chan·əl ¦fet ′mī·krə‚fōnor¦ef¦ē¦tē]

(engineering acoustics)

A microphone in which a membrane is used as the gate to a field-effect transistor (FET) located just below it, and motion of the membrane modulates the current between the source and drain of the transistor.

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