H - Electricity – 04 – R
Patent
H - Electricity
04
R
349/69
H04R 19/01 (2006.01) G01H 11/06 (2006.01)
Patent
CA 1185694
-22- ELECTRET TRANSDUCER WITH VARIABLY CHARGED ELECTRET FOIL Abstract An electret transducer for producing a highly directional response characteristic comprises a backplate and, superimposed thereon, an electrostatically charged electret foil. The electrostatic charge varies according to a predetermined relationship. The sensitivity of the electret transducer, at any point thereon, is directly proportional to the electrostatic charge on the electret foil at that point.
415615
Busch-Vishniac Ilene J.
Wallace Robert L. JR.
West James E.
Kirby Eades Gale Baker
Western Electric Company Incorporated
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