Piezoelectric loudspeaker

摘要

A piezoelectric loudspeaker using a thin plate of piezoelectric ceramics of a high dielectric constant, and fixing a piezoelectric transducer including a thin plate of piezoelectric ceramic of a high dielectric constant onto a diaphragm stretched on a frame, thereby forming a sound generator. The piezoelectric loudspeaker is so constructed that the resonance frequency of the sound generator is set at the low frequency band side of an audio frequency region and that of a cavity by the frame is set at the high frequency band side, the thin plate piezoelectric ceramic of high dielectric constant being used, so that the piezoelectric loudspeaker is of an ultrathin type and can cover the whole audio frequency region.