electret microphone


electret microphone

[i′lek‚tret ′mī·krə‚fōn] (engineering acoustics) A microphone consisting of an electret transducer in which the foil electret diaphragm is placed next to a perforated, ridged, metal or metal-coated backplate, and output voltage, taken between diaphragm and backplate, is proportional to the displacement of the diaphragm.