capacitor microphone

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capacitor microphone [kə′pas·əd·ər ′mī·krə‚fōn]

(engineering acoustics)

A microphone consisting essentially of a flexible metal diaphragm and a rigid metal plate that together form a two-plate air capacitor; sound waves set the diaphragm in vibration, producing capacitance variations that are converted into audio-frequency signals by a suitable amplifier circuit. Also known as condenser microphone; electrostatic microphone.

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