- A speaker in which a flexible metal diaphragm and a rigid plate form a two-plate air capacitor. The mechanical vibration of its thin sound-producing diaphragm is produced by electrostatic fields produced between it and a rigid plate, each with a high audio voltage applied to them. Also called electrostatic loudspeaker, capacitive speaker, capacitor speaker, or condenser speaker.
- synonym electrostatic loudspeaker
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