Piezoelectric speaker

Details Piezoelectric speaker Piezoelectric speaker

1989-02-21

1990-11-06

Ng, Jin F.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electrostrictive, magnetostrictive, or piezoelectric

310324, 310345, 381182, 381186, 381203, H04R 1700, H04R 704, H01L 4109, H01L 4118

Patent

active

049691970

ABSTRACT:
A piezoelectric speaker in which a diaphragm containing a piezoelectric driver is fixed on a frame through an elastic supporting member. The diaphragm is an assembly of two resin foam plates facing each other. Each resin foam plate has a recess and a projecting member at the substantial center of the recess bottom. The piezoelectric driver is accommodated in the space made of the two recesses while being interposed and supported by the projecting members at the substantial center thereof.

REFERENCES:
patent: 2912605 (1959-11-01), Tibbetts
patent: 4008408 (1977-02-01), Kodama
patent: 4430529 (1984-02-01), Nakagawa et al.
patent: 4597099 (1986-06-01), Sawafuji
patent: 4820952 (1989-04-01), Lee

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