Electret transducer with variable electret foil thickness

Details Electret transducer with variable electret foil thickness Electret transducer with variable electret foil thickness

H - Electricity

04

R

349/69

H04R 19/01 (2006.01) G01H 11/06 (2006.01) G10K 11/32 (2006.01)

Patent

CA 1186047

- 23 - ELECTRET TRANSDUCER WITH VARIABLE ELECTRET FOIL THICKNESS Abstract An acoustic transducer for producing highly directional characteristics comprises a metalized backplate facing the flat surface of an electrostatically charged electret foil. The thickness of the electret foil varies along the length thereof according to a predetermined relationship. The sensitivity of the electret transducer varies directly with the thickness of the electret foil.

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