Spherical piezoelectric speaker

Details Spherical piezoelectric speaker Spherical piezoelectric speaker

1996-10-01

1998-10-20

Le, Huyen

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electrostrictive, magnetostrictive, or piezoelectric

381423, H04R 2500

Patent

active

058259023

ABSTRACT:
A spherical piezoelectric speaker having a small and simple structure, a wide sound frequency range and a high sound pressure includes a spherical shell piezoelectric ceramic body which is hollow inside and an external electrode and an internal electrode defining a driving device for oscillating the spherical shell piezoelectric ceramic body. A sound absorber is provided in a hollow section of the piezoelectric ceramic body and a frame for holding the piezoelectric ceramic body is disposed on the outer surface of the piezoelectric ceramic body via dampers for reducing an influence of external oscillation.

REFERENCES:
patent: 2939970 (1960-06-01), Dranetz et al.
patent: 3708702 (1973-01-01), Brunnert et al.
patent: 4440983 (1984-04-01), Facoetti et al.
patent: 4843275 (1989-06-01), Radice
patent: 4866683 (1989-09-01), Phillips

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