Arcuately tensioned piezoelectric diaphragm microphone
AssigneeTelephonics Corporation
InventorsEdwin Joscelyn, Michael J. Ferrante, Robert F. Saiya
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Abstract
A lightweight piezoelectric microphone using a metallized piezoelectric diaphragm arcuately bowed by a boss on a slotted baffle plate held in close parallel proximity to the diaphragm is disclosed. Slotted Helmholtz resonators provide frequency response shaping and wide band noise cancellation. Electrical contact between the diaphragm and an electrical conductor is provided by a conductive, elastic material compressed by parts of the microphone housing, into electrical contact with the conductor and a metallized side of the diaphragm.
Claims11
A piezoelectric acousto-electric transducer comprising:
- (a) a peripherally supported, metallized piezoelectric diaphragm;
- (b) a baffle plate in close parallel proximity to said piezoelectric diaphragm;
- (c) a boss protruding from said baffle plate with sufficient height to arcuately tension said diaphragm away from said baffle plate;
- and
- (d) means for making electrical contact to the metallized piezoelectric diaphragm.
Dependencies are inferred from the claim text.