Piezoelectric electroacoustic transducer

Details Piezoelectric electroacoustic transducer Piezoelectric electroacoustic transducer

1976-12-29

1977-12-13

Stellar, George G.

H04R 1700

Patent

active

040630498

ABSTRACT:
An electroacoustic transducer, such as a microphone or a telephone receiver, comprises a thermoplastic body with a central plateau surrounded by an annular recess from which an elastic ring projects slightly above the plateau to support a membrane in the form of sheet-metal foil carrying a piezoceramic layer. The body is overlain by a thermoplastic cover which has apertures for the passage of sound waves and is formed with an internal annular rib registering with the elastic ring to clamp the rim of the membrane therebetween. The body, the cover and a thermoplastic base are joined together by ultrasonic welding.

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