Piezoelectric speaker

Details Piezoelectric speaker Piezoelectric speaker

1990-07-12

1991-07-09

Ng, Jin F.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electrostrictive, magnetostrictive, or piezoelectric

381173, 381186, 310324, H04R 2500, H01L 4104

Patent

active

050312227

ABSTRACT:
A piezoelectric speaker which generates sound by vibrating a plane diaphragm using a plurality of piezoelectric drivers is disclosed. The diaphragm is formed of resin foam plates and the piezoelectric drivers are contained therein while being interposed and supported at the centers thereof. The piezoelectric drivers are divided into at least two groups which have different primary resonance frequencies.

REFERENCES:
patent: 2411146 (1946-11-01), Clement
patent: 2911484 (1959-11-01), Spitzer et al.
patent: 4430529 (1984-02-01), Nakagawa et al.
patent: 4751419 (1988-06-01), Takahata
patent: 4807294 (1989-02-01), Iwata et al.

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