Invention Grant
- Patent Title: Acoustic feedback suppression apparatus, microphone apparatus, amplifier apparatus, sound amplification system, and acoustic feedback suppression method
- Patent Title (中): 声反馈抑制装置，麦克风装置，放大器装置，声音放大系统和声反馈抑制方法
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Application No.: US13512175Application Date: 2010-11-25
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Publication No.: US09031258B2Publication Date: 2015-05-12
- Inventor: Ryosuke Kitago , Yuji Kawasaki , Keiji Yamahai
- Applicant: Ryosuke Kitago , Yuji Kawasaki , Keiji Yamahai
- Applicant Address: JP Osaka
- Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: Greenblum & Bernstein, P.L.C.
- Priority: JP2009-271186 20091130
- International Application: PCT/JP2010/006891 WO 20101125
- International Announcement: WO2011/065003 WO 20110603
- Main IPC: H04B15/00
- IPC: H04B15/00 ; H04R3/02
Abstract:
An acoustic feedback suppression apparatus includes an amplitude measurement section for measuring the amplitude of a sound signal input from a microphone, an amplitude attenuation section for attenuating the amplitude of a sound signal output to a speaker, and an acoustic feedback determination section for determining whether or not acoustic feedback is occurring based on the sound signal input from the microphone. If it is determined that acoustic feedback is occurring, a sound-deadening control section enables sound-deadening control so that the amplitude of the sound signal output to the speaker is attenuated to a sound-deadening level. A sound-deadening release section releases the sound-deadening control if the amplitude of the sound signal input from the microphone is more than specified threshold amplitude and if it is determined that acoustic feedback is not occurring while the sound-deadening control is conducted.
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