PIEZOELECTRIC SOUND ELEMENT

摘要

Provided is a piezoelectric sound element capable of flattening a sound pressure frequency property and reducing variation in the sound pressure frequency property, compared to the prior art. A diaphragm (13) is formed into a disc shape having a circular outline. The diaphragm (13) is provided by adhesion, on its bottom wall (3b) side, with a piezoelectric element (15) having an asymmetric octagonal shape comprising a pair of opposing long sides (15a), a pair of opposing short sides (15b), and four connecting sides (15c).