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    • 10. 发明申请
    • ACOUSTIC FEEDBACK SUPPRESSION APPARATUS, MICROPHONE APPARATUS, AMPLIFIER APPARATUS, SOUND AMPLIFICATION SYSTEM, AND ACOUSTIC FEEDBACK SUPPRESSION METHOD
    • 声音反馈抑制装置,麦克风装置,放大器装置,声音放大系统和声音反馈抑制方法
    • US20120281855A1
    • 2012-11-08
    • US13512175
    • 2010-11-25
    • Ryosuke KitagoYuji KawasakiKeiji Yamahai
    • Ryosuke KitagoYuji KawasakiKeiji Yamahai
    • H04B15/00H03G3/20H03F99/00
    • H04R3/02
    • 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.
    • 声反馈抑制装置包括用于测量从麦克风输入的声音信号的幅度的振幅测量部分,用于衰减输出到扬声器的声音信号的振幅的振幅衰减部分,以及用于确定是否或 基于从麦克风输入的声音信号不发生声反馈。 如果确定发生声反馈,则声音衰减控制部分使得能够进行声音衰减控制,使得输出到扬声器的声音信号的幅度被衰减到消音水平。 如果从麦克风输入的声音信号的幅度大于指定的阈值幅度,并且如果确定在进行声音衰减控制时不发生声反馈,则消音释放部分释放声音衰减控制。