G - Physics – 10 – K
Patent
G - Physics
10
K
G10K 11/16 (2006.01) H04M 1/03 (2006.01) H04M 1/19 (2006.01) H04R 1/22 (2006.01) H04R 3/02 (2006.01)
Patent
CA 2139202
An arrangement for noise removal according to the present invention includes a microphone and an acoustic high-pass filter positioned in front of the microphone and consisting of the combination of an acoustic resistance, an acoustic compliance and an inertance. According to the invention, the acoustic resistance is composed of nonwoven fabric; the acoustic compliance, of a cavity; and the inertance, of a thin cavity connected to said cavity. This acoustic high-pass filter reduces unpleasant noise which arises from the microphone when a low-frequency high-pressure air stream, such as the speaker's breath, hits the mouthpiece of the telephone.
Dispositif de suppression de bruit, comprenant un microphone et un filtre acoustique passe-haut placé devant le microphone. Le filtre combine un élément de résistance acoustique, un élément d'élasticité acoustique et un élément d'inertance, composés respectivement de non-tissé; d'une cavité assurant l'élasticité acoustique; et d'une cavité mince reliée à la première cavité. Il réduit le bruit désagréable que produit le microphone lorsqu'un jet d'air de basse fréquence sous haute pression, dû p. ex. au souffle du locuteur, frappe l'embouchure du téléphone.
Sisido Michitaka
Yoshida Toshio
Corporation Nec
Smart & Biggar
LandOfFree
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