Ultrasonic ceramic microphone

Details Ultrasonic ceramic microphone Ultrasonic ceramic microphone

1976-04-06

1977-10-04

Stellar, George G.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310358, H04R 1702, H04R 1710

Patent

active

040526275

ABSTRACT:
An ultrasonic ceramic microphone having a wide operating frequency range, including piezoelectric ceramic plates disposed on upper and lower surfaces of a metal plate, wherein the ultrasonic ceramic microphone is operated near two or three adjacent resonance frequencies and in a frequency band covering those resonance frequencies, of a fundamental wave and respective higher order harmonics of the deflection vibration of a transducer comprising the metal plate and the pair of piezoelectric ceramic plates.

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