Patent ID: 6747395
Filing Date: 2004-06-08
Classification: H04R

Abstract:
A piezoelectric loudspeaker comprising:a piezoelectric vibrator including a diaphragm and a piezoelectric member provided on at least one face of the diaphragm, the diaphragm being vibrated by the piezoelectric member; a frame for supporting the piezoelectric vibrator; and a visco-elastic member provided on at least one face of the piezoelectric vibrator, the visco-elastic member being disposed in a substantial center of the piezoelectric vibrator, the visco-elastic member having a bottom face area which accounts for about 11% to about 80% of a bottom face area of the diaphragm, the visco-elastic member comprising first and second visco-elastic members provided on opposite sides of the piezoelectric vibrator, and the first and second visco-elastic members comprising different materials or different shapes.