Piezoelectric transducer apparatus

Details Piezoelectric transducer apparatus Piezoelectric transducer apparatus

1981-12-30

1983-11-01

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310322, 179110A, H01L 4108

Patent

active

044131984

ABSTRACT:
An electroacoustic loudspeaker apparatus is provided including a piezoelectric driver element, the opposed major surfaces of which are acoustically coupled into first and second resonant structures. The first resonant structure exhibits a resonant frequency less than the resonant frequency of the driver and the second resonant structure exhibits a resonant frequency greater than the resonant frequency of the driver thus resulting in a broadened or enhanced frequency response.

REFERENCES:
patent: 3748502 (1973-07-01), Bernstein
patent: 3856995 (1974-12-01), Cragg et al.
patent: 3873866 (1975-03-01), Goble
patent: 3921016 (1975-11-01), Livermore
patent: 3970879 (1976-07-01), Kumon
patent: 3978353 (1976-08-01), Kinoshita
patent: 3982142 (1976-09-01), Goble
patent: 4042845 (1981-08-01), Hackett
patent: 4079213 (1981-03-01), Bage et al.
patent: 4156800 (1979-05-01), Sear
patent: 4292561 (1981-09-01), Martin

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