PIEZOELECTRIC SPEAKER

摘要

The present invention relates to a piezoelectric speaker, which comprises: a piezoelectric layer for outputting a sound by converting an electric signal into vibration; an electrode formed in an upper part or a lower part of the piezoelectric layer, and applying the electric signal to the piezoelectric layer; an acoustic vibration plate composed of a heterogeneous material including first and second acoustic vibration plates, and attached to the lower part of the piezoelectric layer having the electrode formed therein; and a frame attached to surround a side surface of the acoustic vibration plate.