| US 7,602,931 B2 | ||
| Gasket for reducing electromagnetic interference in a boundary microphone | ||
| Hiroshi Akino, Machida (Japan); Kazuhisa Kondo, Machida (Japan); and Satoshi Yoshino, Machida (Japan) | ||
| Assigned to Kabushiki Kaisha Audio-Technica, Machida-shi, Tokyo (Japan) | ||
| Filed on May 16, 2005, as Appl. No. 11/129,288. | ||
| Claims priority of application No. 2004-147310 (JP), filed on May 18, 2004. | ||
| Prior Publication US 2005/0259842 A1, Nov. 24, 2005 | ||
| Int. Cl. H04R 9/08 (2006.01); H04R 11/04 (2006.01); H04R 17/02 (2006.01); H04R 19/04 (2006.01); H04R 21/02 (2006.01) | ||
| U.S. Cl. 381—355 [381/361] | 1 Claim |
| 1. A boundary microphone, comprising:
a microphone case including a flat metallic base opened on a top surface and a metallic microphone cover mounted on the base
so as to cover the top surface of the base, the microphone cover having a number of sound wave introduction holes therein,
a microphone unit housed in the microphone case, and
a gasket having elasticity and conductivity and disposed between the base and an edge face of the microphone cover, said gasket
comprising an elastic core and a conductive fabric covering the elastic core, said conductive fabric being a fabric woven
of thin coil conductors so that the microphone cover and the base are electrically connected to each other with a low impedance
to effectively shield space against strong electromagnetic waves of high frequency.
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