Microphone capable of cancelling mechanical generated noise

Details Microphone capable of cancelling mechanical generated noise Microphone capable of cancelling mechanical generated noise

1977-03-31

1978-11-28

Stellar, George G.

Electrical generator or motor structure

Dynamoelectric

Rotary

179121D, 310800, H04R 1702

Patent

active

041277490

ABSTRACT:
A microphone comprises a pair of electroacoustic transducing high polymer piezoelectric semi cylindrical shaped membranes having a single axis of elongation tangent to the curvature mounted in a housing facing each other. The membranes are electrically series connected to each other with a connection between the facing surfaces thereof and are of prescribed polarizations to generate an output which is substantially twice the voltage developed individually from each membrane when said membranes are caused to flex in opposite directions and substantially zero when said membranes are caused to flex in the same direction.

REFERENCES:
patent: 2126438 (1938-08-01), Williams
patent: 3181016 (1965-04-01), Rosenman
patent: 4008408 (1977-02-01), Kodama
patent: 4056742 (1977-11-01), Tibbetts

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