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    Electronic noise attenuation system
    1.
    发明授权
    Electronic noise attenuation system 失效
    电子噪声衰减系统

    公开(公告)号：US5018202A

    公开(公告)日：1991-05-21

    申请号：US313475

    申请日：1989-02-22

    申请人： Minoru Takahashi ,  Tanetoshi Miura ,  Hareo Hamada ,  Hideki Hyoudo ,  Ryusuke Gotoda ,  Yasushi Yoshimura ,  Takashi Kuribayashi ,  Akio Akasaka

    发明人： Minoru Takahashi ,  Tanetoshi Miura ,  Hareo Hamada ,  Hideki Hyoudo ,  Ryusuke Gotoda ,  Yasushi Yoshimura ,  Takashi Kuribayashi ,  Akio Akasaka

    IPC分类号： H04R3/00 ,  G10K11/178

    CPC分类号： G10K11/1784 ,  G10K2210/3045 ,  G10K2210/3049 ,  G10K2210/508

    摘要： An electronic noise attenuation system for attenuating a sound wave propagated from a source of noise by generating another sound wave 180.degree. out of phase and having the same sound pressure with the propagated sound wave from electro-mechanic transducer means disposed in a propagation passage of sound waves. In the electronic noise attenuation system, a drive signal for drive the electro-mechanic transducer means is generated in accordance with output signals respectively output from upstream-side and downstream-side mechano-electric transducer means respectively disposed in the propagation passage with the electro-mechanic transducer means therebetween. Namely, the drive signal is created by performing an operation on a difference signal between the output signal of the upstream mechano-electric transducer means and the drive signal according to a given transfer function. Also, the transfer function is determined in accordance with the difference signal and the output signal of the downstream mechano-electric transducer means.

    摘要翻译： 一种电子噪声衰减系统，用于衰减从噪声源传播的声波，通过产生与声波传播通道中设置的来自机电传感器装置的传播声波相同并且具有相同声压180°的另一声波 波浪。 在电子噪声衰减系统中，根据从分别设置在传播路径中的上游侧和下游侧机械电传感器装置输出的输出信号，产生用于驱动机电换能器装置的驱动信号， 机械传感器装置在其间。 即，通过根据给定的传递函数对上游机电换能器装置的输出信号和驱动信号之间的差分信号执行操作来创建驱动信号。 而且，传递函数根据差分信号和下游机电换能器装置的输出信号来确定。

    BANDLIMITING ANTI-NOISE IN PERSONAL AUDIO DEVICES HAVING ADAPTIVE NOISE CANCELLATION (ANC)
    4.
    发明申请
    BANDLIMITING ANTI-NOISE IN PERSONAL AUDIO DEVICES HAVING ADAPTIVE NOISE CANCELLATION (ANC) 有权
    在具有自适应噪声消除（ANC）的个人音频设备中绑定防噪声

    公开(公告)号：US20120308028A1

    公开(公告)日：2012-12-06

    申请号：US13472755

    申请日：2012-05-16

    申请人： Nitin Kwatra ,  Ali Abdollahzadeh Milani ,  Jeffrey Alderson

    发明人： Nitin Kwatra ,  Ali Abdollahzadeh Milani ,  Jeffrey Alderson

    IPC分类号： G10K11/16

    CPC分类号： G10K11/178 ,  G10K2210/108 ,  G10K2210/3012 ,  G10K2210/3017 ,  G10K2210/30231 ,  G10K2210/3028 ,  G10K2210/30391 ,  G10K2210/3226 ,  G10K2210/507 ,  G10K2210/508 ,  G10K2210/511 ,  G10K2210/512 ,  G10L21/0208 ,  G10L21/0364 ,  H04R1/1083

    摘要： A personal audio device, such as a wireless telephone, includes noise canceling that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is provided proximate the speaker to measure the output of the transducer in order to control the adaptation of the anti-noise signal and to estimate an electro-acoustical path from the noise canceling circuit through the transducer. The anti-noise signal is adaptively generated to minimize the ambient audio sounds at the error microphone. A processing circuit that performs the adaptive noise canceling (ANC) function also filters one or both of the reference and/or error microphone signals, to bias the adaptation of the adaptive filter in one or more frequency regions to alter a degree of the minimization of the ambient audio sounds at the error microphone.

    摘要翻译： 诸如无线电话的个人音频设备包括噪声消除，其自适应地从参考麦克风信号产生抗噪声信号，并将抗噪声信号注入到扬声器或其他换能器输出中以引起环境音频声音的消除。 在扬声器附近提供误差麦克风以测量换能器的输出，以便控制抗噪声信号的适应性并且估计从噪声消除电路通过换能器的电声路径。 自适应地产生抗噪声信号以最小化误差麦克风处的环境音频声音。 执行自适应噪声消除（ANC）功能的处理电路还对一个或两个参考和/或误差麦克风信号进行滤波，以将自适应滤波器的自适应偏置在一个或多个频率区域中，以改变最小化的程度 错误麦克风处的环境声音发出声音。

    Active noise control using phased-array active resonators
    5.
    发明授权
    Active noise control using phased-array active resonators 失效
    使用相控阵有源谐振器的主动噪声控制

    公开(公告)号：US5778081A

    公开(公告)日：1998-07-07

    申请号：US606460

    申请日：1996-03-04

    申请人： William P. Patrick

    发明人： William P. Patrick

    IPC分类号： G10K11/16 ,  G10K11/172 ,  G10K11/178

    CPC分类号： G10K11/1786 ,  G10K11/161 ,  G10K11/172 ,  G10K11/1788 ,  G10K2210/112 ,  G10K2210/3026 ,  G10K2210/3027 ,  G10K2210/3046 ,  G10K2210/32271 ,  G10K2210/508 ,  G10K2210/512

    摘要： An active noise control system includes sensors 16,26 which detects noise 114 and provides electronic signals to an active noise control (ANC) controller 20. The controller provides electronic anti-noise signals to a speaker 24 which is connected to, and provides acoustic anti-noise into, a plurality of active resonators 120-124. The resonators 120-124 are disposed successively along the propagation direction of the noise 114 and provide time-delayed anti-noise acoustic output signals each of which attenuates a portion of the noise 114. The phasing of the anti-noise signals from the resonators 120-124 may be accomplished by acoustic and/or electronic time delays.

    摘要翻译： 主动噪声控制系统包括传感器16,26，其检测噪声114并向主动噪声控制（ANC）控制器20提供电子信号。控制器向扬声器24提供电子抗噪声信号，扬声器24连接到扬声器24并提供声反射 - 多个有源谐振器120-124。 谐振器120-124沿着噪声114的传播方向依次布置，并且提供每个衰减噪声114的一部分的时间延迟的抗噪声声输出信号。来自谐振器120的抗噪声信号的定相 -124可以通过声学和/或电子时间延迟来实现。