electret transducer

electret transducer

[i′lek‚tret tranz′dü·sər]
(electronics)
An electroacoustic or electromechanical transducer in which a foil electret, stretched out to form a diaphragm, is placed next to a metal or metal-coated plate, and motion of the diaphragm is converted to voltage between diaphragm and plate, or vice versa.
References in periodicals archive ?
Using a pair of electret transducers (6 mm diameter, 2 mm thick) the phase delay between them can be used to determine the propagation speed of the pressure disturbance.