Patent ID: 6347147
Filing Date: 2002-02-12
Classification: H04R

Abstract:
A high-noise suppression microphone, comprising:a. A film of piezoelectric material having two opposite faces, b. Two thin films of conductive material, one of said films of conductive material being affixed to one of said two opposite faces and another of said films of conductive material being affixed to another of said two opposite faces, thereby forming a piezoelectric sandwich element with the thin film of piezoelectric material in between the two thin films of conductive material such that a first face of the piezoelectric sandwich element is defined by said one of said films of conductive material and such that a second face of the piezoelectric sandwich element is defined by said another of said films of conductive material, c. A flat, substantially inflexible substrate laminated to the piezoelectric sandwich element along substantially the entire surface of the first face of the piezoelectric sandwich element, d. Two connecting conductors connected to the two films of conductive material for carrying an electrical signal between the piezoelectric sandwich element and some external point, and e. An ambient noise filter embedding the piezoelectric sandwich element and inflexible substrate except for the second face of the piezoelectric sandwich element for substantially preventing sound impinging on the noise filter from reaching the film of piezoelectric material.