公开(公告)号：WO2017083530A1

公开(公告)日：2017-05-18

申请号：PCT/US2016/061348

申请日：2016-11-10

Applicant: BOSE CORPORATION

Inventor： PAN, Davis Y.

IPC: H04M9/08

CPC classification number: H04R29/001 ,  G10K11/178 ,  G10K2210/3028 ,  G10K2210/3055 ,  H04M9/082

Abstract: An acoustic echo canceller includes an adaptive filter and a double-talk detector. The adaptive filter includes a linear filter and a coefficient calculator. The linear filter has a transfer function that is controlled by a set of variable filter coefficients and that is configured to cancel an estimate of echo in a microphone signal to provide an output signal. The coefficient calculator is configured to update the set of variable filter coefficients based on a variable adaptation rate. The double-talk detector is configured to calculate changes in the energy of the variable filter coefficients (between updates of the coefficients). The acoustic echo canceller is configured to adjust the variable adaptation rate based on whether the energy of the variable filter coefficients is determined to be either oscillating or steadily changing (increasing or decreasing).

Abstract translation: 声学回声消除器包括自适应滤波器和双方讲话检测器。 自适应滤波器包括线性滤波器和系数计算器。 线性滤波器具有由一组可变滤波器系数控制的传递函数，并且该传递函数被配置为消除麦克风信号中的回声估计以提供输出信号。 系数计算器被配置为基于可变自适应速率来更新该组可变滤波器系数。 双通话检测器被配置为计算可变滤波器系数的能量的变化（在系数的更新之间）。 声学回声消除器被配置为基于可变滤波器系数的能量被确定为振荡还是稳定地变化（增加或减少）来调整可变自适应速率。

公开(公告)号：WO2015026568A1

公开(公告)日：2015-02-26

申请号：PCT/US2014/050682

申请日：2014-08-12

Applicant: BOSE CORPORATION

Inventor： GANESHKUMAR, Alaganandan

IPC: G10K11/178

CPC classification number: G10K11/002 ,  G10K11/178 ,  G10K2210/1282 ,  G10K2210/3028 ,  G10K2210/3032 ,  G10K2210/3055 ,  G10K2210/503

Abstract: 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.

Abstract translation: 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。

公开(公告)号：WO2013113649A1

公开(公告)日：2013-08-08

申请号：PCT/EP2013/051558

申请日：2013-01-28

Applicant: HARMAN BECKER AUTOMOTIVE SYSTEMS GMBH

Inventor： CHRISTOPH, Markus

IPC: G10K11/178

CPC classification number: H04R3/002 ,  G10K11/178 ,  G10K2210/1081 ,  G10K2210/3048 ,  G10K2210/3055 ,  H04R1/1083 ,  H04R2410/05 ,  H04R2430/01

Abstract: A method of adjusting an ANC system is disclosed in which a microphone is acoustically coupled to a loudspeaker via a secondary path and the loudspeaker is electrically coupled to the microphone via an ANC filter. The method comprises measuring phase characteristics of the secondary path in various modes of operation; determining from the measured phase characteristics a statistical dispersion of the phase characteristics in the various modes of operation; determining from the statistical dispersion a minimum phase margin; adjusting the ANC filter to exhibit in any one of the modes of operation phase characteristics that are equal to or greater than the minimum phase margin; and adjusting the ANC filter to exhibit in any one of the modes of operation amplitude characteristics that are equal to or smaller than a maximum gain margin.

Abstract translation: 公开了一种调节ANC系统的方法，其中麦克风通过辅助路径声学耦合到扬声器，并且扬声器经由ANC滤波器电耦合到麦克风。 该方法包括在各种运行模式下测量次路径的相位特性; 根据测量的相位特性确定各种运行模式下的相位特性的统计色散; 从统计色散确定最小相位裕度; 调整ANC滤波器以在最小相位裕度等于或大于的运行相位特性模式中的任何一个中展现出来; 以及调整所述ANC滤波器以显示等于或小于最大增益裕度的操作振幅特性模式中的任何一种。

公开(公告)号：WO2012119808A2

公开(公告)日：2012-09-13

申请号：PCT/EP2012/051152

申请日：2012-01-25

Applicant: AUSTRIAMICROSYSTEMS AG ,  SCHOERKMAIER, Martin

Inventor： SCHOERKMAIER, Martin

IPC: G10K11/178

CPC classification number: G10K11/175 ,  G10K11/178 ,  G10K2210/1081 ,  G10K2210/3026 ,  G10K2210/3027 ,  G10K2210/3055 ,  H04R1/1083 ,  H04R2460/01

Abstract: Ein Regelsystem für eine aktive Geräuschunterdrückung umfasst einen Lautsprecher sowie eine Addiereinrichtung, an die der Lautsprecher angeschlossen ist. Eine Vorwärtsregelung sowie eine Rückwärtsregelung umfassen jeweils ein Mikrofon zur Aufnahme von Störgeräuschen beziehungsweise zur Aufnahme eines von dem Lautsprecher abgegebenen Schalls. Regelnetzwerke zur Bildung einer jeweiligen Regelgröße sind mit den entsprechenden Mikrofonen gekoppelt und ausgangsseitig an die Addiereinrichtung angeschlossen. Erfindungsgemäß ist vorgesehen, die Rückwärtsregelung für eine Geräuschunterdrückung basierend auf einem ersten akustischen Verhältnis abzustimmen und die Vorwärtsregelung für eine Geräuschunterdrückung basierend auf einem zweiten akustischen Verhältnis abzustimmen. Das Regelnetzwerk der Rückwärtsregelung ist ausgebildet, die Regelgröße der Vorwärtsregelung wenigstens teilweise zu kompensieren, wenn sich aktuelle akustische Verhältnisse in Richtung des ersten akustischen Verhältnisses ändern.

Abstract translation: 用于有源噪声消除的控制系统，包括扬声器和所述扬声器连接的加法器。 前馈和反馈控制的每一个包括一个麦克风，用于接收噪声或从扬声器发出的声音接收输出。 调控网络以形成相应的控制变量被耦合到相应的麦克风和连接到加法器的输出侧。 本发明提供调谐基于第一声学比用于降低噪声的反馈控制和调整用于基于第二声学比率的噪声抑制的前馈控制。 反馈控制的控制网络被实现为至少部分地补偿所述前馈控制的控制变量，当在第一声学比变化的方向的电流的声学条件。

公开(公告)号：WO2012074403A2

公开(公告)日：2012-06-07

申请号：PCT/NL2011/050828

申请日：2011-12-01

Applicant: NEDERLANDSE ORGANISATIE VOOR TOEGEPAST-NATUURWETENSCHAPPELIJK ONDERZOEK TNO ,  BERKHOFF, Arthur Perry ,  WESSELINK, Johan

Inventor： BERKHOFF, Arthur Perry ,  WESSELINK, Johan

IPC: G10K11/178

CPC classification number: G10K11/178 ,  G10K2210/12 ,  G10K2210/3055

Abstract: The invention provides an active noise reducing filter apparatus for actively reducing noise d from at least one primary noise source reference signal x. The apparatus comprises a secondary source signal connector connected to a secondary source generating secondary noise y based on a secondary signal u for reducing said primary noise d. A sensor connector is connected to a sensor for measuring said primary and secondary noise as an error signal e. A reference signal connector receives the reference signal x, and a control filter W receives the reference signal x and calculates a control signal for providing the signal u. An adaptation circuit receives said error signal e and reference signal x and adapts the control filter W. The adaptation circuit adapts the filter W using a representation of said secondary source including a secondary source transfer function G of said secondary source and an additional damping for providing improved stability.

Abstract translation: 本发明提供一种主动降噪滤波器装置，用于从至少一个主要噪声源参考信号x主动降低噪声d。 该装置包括连接到次级源的次级源信号连接器，其基于用于减小所述初级噪声d的次级信号u产生次级噪声y。 传感器连接器连接到用于测量所述初级和次级噪声的传感器作为误差信号e。 参考信号连接器接收参考信号x，并且控制滤波器W接收参考信号x并且计算用于提供信号u的控制信号。 适应电路接收所述误差信号e和参考信号x并使控制滤波器W适配。适配电路使用包括所述次级源的次级源传递函数G的所述次级源的表示来适配滤波器W，以及用于提供 改善稳定性。

公开(公告)号：WO2011137762A2

公开(公告)日：2011-11-10

申请号：PCT/CN2011073822

申请日：2011-05-09

Applicant: HUAWEI TECH CO LTD ,  YANG CHENGPENG ,  LI BAOSHENG

Inventor： YANG CHENGPENG ,  LI BAOSHENG

IPC: G10K11/178

CPC classification number: G10K11/178 ,  G10K2210/109 ,  G10K2210/121 ,  G10K2210/3033 ,  G10K2210/3048 ,  G10K2210/3055

Abstract: Provided are a rotating device noise control method and a controller. The control method includes: gain an acoustic signal of noise produced by the rotating device and the signal is a feedback from a reference sensor; gain a revolving speed information of the rotating device; according to said revolving speed information, inquire a function mapping table which is produced in advance to gain a transfer function; according to the transfer function and the acoustic signal, produce a sound production order; transmit the sound production order to a secondary sound source production device to cause the secondary sound source production device to send out secondary sound wave. The secondary sound wave is used to suppress the noise produced by the rotating device. The controller includes: a signal gaining module, a revolving speed gaining module, a querying module, a first production module and a transmitting module. It is possible to solve the problem existing in the prior art by using this invention technical solution. The noise reduction purpose is realized truly without influence of target noise intensity produced by the rotating device.

Abstract translation: 提供了旋转装置噪声控制方法和控制器。 控制方法包括：获得由旋转装置产生的噪声的声信号，并且信号是来自参考传感器的反馈; 获得旋转装置的转速信息; 根据所述转速信息，查询预先产生的函数映射表以获得传递函数; 根据传递函数和声信号，产生声音生产订单; 将声音生成指令发送到二次声源生成装置，使二次声源生成装置发出次声波。 二次声波用于抑制旋转装置产生的噪音。 控制器包括：信号增益模块，转速增益模块，查询模块，第一生产模块和发送模块。 通过使用本发明的技术方案，可以解决现有技术中存在的问题。 降噪目的是真正实现的，不受旋转装置产生的目标噪声强度的影响。

公开(公告)号：WO2011079722A1

公开(公告)日：2011-07-07

申请号：PCT/CN2010/079851

申请日：2010-12-16

Applicant: 歌尔声学股份有限公司 ,  赵剑 ,  刘崧

Inventor： 赵剑 ,  刘崧

IPC: H04R3/02

CPC classification number: H04R1/1083 ,  G10K11/178 ,  G10K2210/1081 ,  G10K2210/3055 ,  H04R1/1016 ,  H04R2410/05 ,  H04R2460/01

公开(公告)号：WO2008138349A2

公开(公告)日：2008-11-20

申请号：PCT/DK2008/050106

申请日：2008-05-13

Applicant: MICROSOUND A/S ,  FARVER, Niels

Inventor： FARVER, Niels

IPC: H04R5/04 ,  A61F11/14 ,  G10K11/178

CPC classification number: H04R5/04 ,  A61F2011/145 ,  G10K11/178 ,  G10K2210/3055 ,  H04R1/1083

Abstract: The present invention relates to a method for use in an earphone or headset system, said system comprising at least one sound reproduction transducer (341), at least one microphone (101) arranged to pick up ambient sound signals, and a processor arranged to process at least one of - at least one electronic sound signal obtained by an electronic source input (201) and/or - said ambient sound signals, wherein said method employs an arrangement of said processor to process said signals so that time varying characteristics of one of said signals may modify a processing of an other of said signals prior to reproduction via said sound reproduction transducer (341), characterized in that said processor - determines an estimate of an acoustic transfer function of a leakage path (510) between the environment and an ear cavity of a wearer of said system, - employs said estimate of said acoustic transfer function to estimate a level of ambient sound reaching an eardrum of said wearer of said system, and establishes settings for said processing of said signals on the basis of said estimate of said level of ambient sound reaching said eardrum.

Abstract translation: 本发明涉及一种在耳机或头戴式耳机系统中使用的方法，所述系统包括至少一个声音再现传感器（341），布置成拾取环境声音信号的至少一个麦克风（101）和布置成处理 - 通过电子源输入（201）和/或 - 所述环境声音信号获得的至少一个电子声音信号中的至少一个，其中所述方法采用所述处理器的布置来处理所述信号，使得时变特性 所述信号可以在经由所述声音再现换能器（341）再现之前修改所述信号中的另一个的处理，其特征在于，所述处理器确定所述环境和所述声音再现传感器之间的泄漏路径（510）的声学传递函数的估计 所述系统的佩戴者的耳腔， - 使用所述声学传递函数的所述估计来估计到达所述系统的所述穿戴者的鼓膜的环境声音的水平 并且基于所述到达所述鼓膜的所述环境声音的水平的估计，建立所述处理所述信号的设置。

公开(公告)号：WO00036590A1

公开(公告)日：2000-06-22

申请号：PCT/SE1999/002218

申请日：1999-11-29

IPC: G10K11/178

CPC classification number: G10K11/178 ,  G10K2210/106 ,  G10K2210/1281 ,  G10K2210/1282 ,  G10K2210/30232 ,  G10K2210/3055 ,  G10K2210/3221

Abstract: The invention concerns a method and a device for actively reducing the level of a primary field of sound or vibration in a space (2). Control sensors (7) sense a parameter related to said level. Actuators (6) produce a secondary field of sound or vibration interfering with said primary field. A first transfer function matrix defines for each control sensor the level of the parameter caused by the actuator excitation. Monitor sensors (16) sense said parameter related to the level of the primary field. A second transfer matrix defines for each monitor sensor (16) the level caused by actuator excitation. A control unit (10) controls the actuators (6) by the relation between the first transfer matrix and the second transfer matrix, the control sensors (7) and the monitor sensors (16), and a residual vector of the actual level of the control sensors.

Abstract translation: 本发明涉及一种用于主动地减小空间（2）中的主要场声或振动水平的方法和装置。 控制传感器（7）检测与所述水平相关的参数。 致动器（6）产生与所述主场相干扰的第二声场或振动场。 第一传递函数矩阵为每个控制传感器定义由致动器激励引起的参数电平。 监视传感器（16）感测与主场的等级有关的所述参数。 第二传输矩阵为每个监视传感器（16）定义由致动器激励引起的电平。 控制单元（10）通过第一传送矩阵和第二传送矩阵之间的关系，控制传感器（7）和监视器传感器（16）来控制致动器（6），并且将实际水平的残差矢量 控制传感器。

公开(公告)号：WO2017096174A1

公开(公告)日：2017-06-08

申请号：PCT/US2016/064635

申请日：2016-12-02

Applicant: KNOWLES ELECTRONICS, LLC

Inventor： UNRUH, Andrew David

IPC: A61F11/06 ,  G10K11/16 ,  H03B29/00

CPC classification number: G10K11/1781 ,  G10K11/17857 ,  G10K11/17873 ,  G10K2210/1081 ,  G10K2210/3027 ,  G10K2210/3028 ,  G10K2210/3055

Abstract: Systems and methods for active noise cancellation are provided. An example method includes receiving at least two reference signals associated with at least two reference positions. Each of the at least two reference signals includes at least one captured acoustic sound representing an unwanted noise. The reference signals are filtered by individual filters to obtain filtered signals. The filtered signals are combined to obtain a feedforward signal. The feedforward signal is played back to reduce the unwanted noise at a pre-determined space location. The individual filters are determined based on linear combinations of at least two transfer functions. Each of the at least two transfer functions is associated with one of the reference positions. In certain embodiments, the at least two reference signals are captured by at least two feedforward microphones.

Abstract translation: 提供了用于主动噪声消除的系统和方法。 示例方法包括接收与至少两个参考位置相关联的至少两个参考信号。 至少两个参考信号中的每一个包括代表不希望有的噪声的至少一个捕获的声音。 参考信号被各个滤波器滤波以获得滤波后的信号。 滤波的信号被组合以获得前馈信号。 回放前馈信号以减少预定空间位置处的不需要的噪声。 各个滤波器是基于至少两个传递函数的线性组合来确定的。 至少两个传递函数中的每一个与参考位置中的一个相关联。 在某些实施例中，至少两个参考信号由至少两个前馈麦克风捕获。