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    Systems and methods for performance and stability control for feedback adaptive noise cancellation
    5.
    发明授权
    Systems and methods for performance and stability control for feedback adaptive noise cancellation 有权
    用于反馈自适应噪声消除的性能和稳定性控制的系统和方法

    公开(公告)号：US09552805B2

    公开(公告)日：2017-01-24

    申请号：US14577519

    申请日：2014-12-19

    申请人： Cirrus Logic, Inc.

    发明人： Yang Lu ,  Dayong Zhou ,  Antonio J. Miller ,  Ning Li

    IPC分类号： G10K11/178 ,  H04R1/10

    CPC分类号： G10K11/178 ,  G10K11/17833 ,  G10K11/17875 ,  G10K11/17881 ,  G10K2210/1081 ,  G10K2210/3056 ,  G10K2210/503 ,  G10K2210/506 ,  H04R1/1083 ,  H04R2460/01

    摘要： A method for cancelling ambient audio sounds in the proximity of a transducer may include receiving an error microphone signal indicative of the output of the transducer and ambient audio sounds at the transducer. The method may also include generating an anti-noise signal for countering the effects of ambient audio sounds at an acoustic output of the transducer, wherein generating the anti-noise signal comprises applying a feedback filter having a response that generates a feedback anti-noise signal based on the error microphone signal and applying a variable gain element in series with the feedback filter. The method may further include monitoring whether an ambient audio event is occurring that could cause the feedback filter to generate an undesirable component in the anti-noise signal and controlling the gain of the variable gain element to reduce the undesirable component.

    摘要翻译： 用于消除传感器附近的环境音频声音的方法可以包括接收指示换能器的输出的误差麦克风信号和换能器处的环境音频声音。 该方法还可以包括产生用于抵消在换能器的声输出处的环境音频声音的影响的抗噪声信号，其中产生抗噪声信号包括应用具有产生反馈抗噪声信号的响应的反馈滤波器 基于误差麦克风信号并与反馈滤波器串联地施加可变增益元件。 该方法还可以包括监视是否正在发生可能导致反馈滤波器在抗噪声信号中产生不期望的分量并且控制可变增益元件的增益以减少不期望的分量的环境音频事件。

    Active vibration/noise control apparatus
    6.
    发明授权
    Active vibration/noise control apparatus 有权
    主动振动/噪声控制装置

    公开(公告)号：US09454953B2

    公开(公告)日：2016-09-27

    申请号：US14760061

    申请日：2013-02-20

    申请人： Atsuyoshi Yano

    发明人： Atsuyoshi Yano

    IPC分类号： G10K11/178

    CPC分类号： G10K11/178 ,  G10K11/17833 ,  G10K2210/121 ,  G10K2210/1291 ,  G10K2210/3028 ,  G10K2210/30391 ,  G10K2210/503

    摘要： A control signal filter 2 receives a sound source signal determined by a control frequency specified in accordance with the vibration/noise source that produces vibration/noise, and outputs a control signal. A filter coefficient update unit 4 updates coefficients of the control signal filter 2 in response to a sound source signal and an error signal. A disturbance detector 6 outputs a disturbance detection result in response to the error signal and an estimated secondary vibration/noise signal. An update controller 7 adjusts an update step of the filter coefficient update unit 4 in accordance with the disturbance detection result.

    摘要翻译： 控制信号滤波器2接收由根据产生振动/噪声的振动/噪声源指定的控制频率确定的声源信号，并输出控制信号。 滤波器系数更新单元4响应于声源信号和误差信号来更新控制信号滤波器2的系数。 干扰检测器6响应于误差信号和估计的二次振动/噪声信号输出干扰检测结果。 更新控制器7根据干扰检测结果来调整滤波器系数更新单元4的更新步骤。

    Systems and methods for adaptive noise cancellation including secondary path estimate monitoring
    7.
    发明授权
    Systems and methods for adaptive noise cancellation including secondary path estimate monitoring 有权
    用于自适应噪声消除的系统和方法，包括二次路径估计监测

    公开(公告)号：US09294836B2

    公开(公告)日：2016-03-22

    申请号：US13952221

    申请日：2013-07-26

    申请人： Cirrus Logic, Inc.

    发明人： Dayong Zhou ,  Yang Lu ,  Ning Li

    IPC分类号： G10K11/16 ,  H04R3/00 ,  G10K11/178

    CPC分类号： H04R3/002 ,  G10K11/16 ,  G10K11/178 ,  G10K11/17817 ,  G10K11/17833 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/3017 ,  G10K2210/3022 ,  G10K2210/3026 ,  G10K2210/3027 ,  G10K2210/3035 ,  G10K2210/3039 ,  G10K2210/3055 ,  G10K2210/3056 ,  G10K2210/503 ,  G10K2210/509

    摘要： In accordance with methods and systems of the present disclosure, a processing circuit may implement at least one of: a feedback filter having a response that generates at least a portion of an anti-noise component from a playback corrected error, the playback corrected error based on a difference between the error microphone signal and a secondary path estimate; and a feedforward filter having a response that generates at least a portion of the anti-noise signal from a reference microphone signal. The processing circuit may also implement a secondary path estimate filter configured to model an electro-acoustic path of a source audio signal and have a response that generates a secondary path estimate from the source audio signal and a secondary path estimate performance monitor for monitoring performance of the secondary path estimate filter in modeling the electro-acoustic path.

    摘要翻译： 根据本公开的方法和系统，处理电路可以实现以下至少一个：具有响应的反馈滤波器，该响应从回放校正误差产生抗噪声分量的至少一部分，基于回放校正误差 在误差麦克风信号和次路径估计之间的差异; 以及前馈滤波器，其具有从参考麦克风信号产生抗噪声信号的至少一部分的响应。 处理电路还可以实现二次路径估计滤波器，其被配置为对源音频信号的电声路径进行建模，并且具有从源音频信号生成次路径估计的响应，以及用于监视源音频信号的次级路径估计性能监视器 二次路径估计滤波器对电声路径进行建模。

    Instability detection and correction in sinusoidal active noise reduction system
    8.
    发明授权
    Instability detection and correction in sinusoidal active noise reduction system 有权
    正弦有源降噪系统中的不稳定性检测和校正

    公开(公告)号：US09177541B2

    公开(公告)日：2015-11-03

    申请号：US13973472

    申请日：2013-08-22

    申请人： Bose Corporation

    发明人： Alaganandan Ganeshkumar

    IPC分类号： G10K11/00 ,  G10K11/178

    CPC分类号： G10K11/002 ,  G10K11/178 ,  G10K2210/1282 ,  G10K2210/3028 ,  G10K2210/3032 ,  G10K2210/3055 ,  G10K2210/503

    摘要： A method for operating an active noise reduction system that is designed to reduce the harmonic or sinusoidal noise emanating from a rotating device, where there is an active noise reduction system input signal that is related to the frequency of the noise to be reduced, and where the active noise reduction system comprises one or more adaptive filters that output a generally sinusoidal noise reduction signal that is used to drive one or more transducers with their outputs directed to reduce the noise. Distortions of the noise reduction signal are detected. A distortion is based at least in part on differences between the frequency of the noise reduction signal and the frequency of the harmonic noise. The noise reduction signal is altered based on the detected distortion.

    摘要翻译： 一种用于操作有源降噪系统的方法，其被设计为减少从旋转装置发出的谐波或正弦噪声，其中存在与待降低的噪声的频率有关的主动降噪系统输入信号，以及其中 有源噪声降低系统包括一个或多个自适应滤波器，其输出用于驱动一个或多个换能器的大致正弦降噪信号，其输出被引导以减少噪声。 检测出降噪信号的失真。 失真至少部分地基于降噪信号的频率和谐波噪声的频率之间的差异。 基于检测到的失真改变降噪信号。

    Speaker damage prevention in adaptive noise-canceling personal audio devices
    10.
    发明授权
    Speaker damage prevention in adaptive noise-canceling personal audio devices 有权
    自适应噪声消除个人音频设备中的扬声器损坏预防

    公开(公告)号：US08848936B2

    公开(公告)日：2014-09-30

    申请号：US13249687

    申请日：2011-09-30

    申请人： Nitin Kwatra ,  Jon D. Hendrix

    发明人： Nitin Kwatra ,  Jon D. Hendrix

    IPC分类号： G10K11/16 ,  G10K11/178

    CPC分类号： G10K11/178 ,  G10K11/17833 ,  G10K2210/3017 ,  G10K2210/3037 ,  G10K2210/3039 ,  G10K2210/3045 ,  G10K2210/3213 ,  G10K2210/503

    摘要： A personal audio device, such as a wireless telephone, includes noise canceling circuit 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. A processing circuit monitors a level of the anti-noise signal, determines that the anti-noise signal may cause damage to the transducer and adjusts the generation of the anti-noise signal such that damage to the transducer is prevented.

    摘要翻译： 诸如无线电话的个人音频设备包括噪声消除电路，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它换能器输出中以引起环境音频声音的消除。 处理电路监视抗噪声信号的电平，确定抗噪声信号可能导致对换能器的损坏并调整抗噪声信号的产生，从而防止对换能器的损坏。