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11. 发明授权

EP3178084B1 ACTIVE REDUCTION OF HARMONIC NOISE FROM MULTIPLE NOISE SOURCES 有权
公开(公告)号：EP3178084B1
公开(公告)日：2018-10-03
申请号：EP15763674.7
申请日：2015-08-19
申请人： Bose Corporation
发明人： GANESHKUMAR, Alaganandan , KLUG, Dennis D.
IPC分类号： G10K11/178
CPC分类号： G10K11/178 , G10K11/17835 , G10K11/17883 , G10K2210/1282 , G10K2210/3026 , G10K2210/3027 , G10K2210/3028 , G10K2210/3033 , G10K2210/3054
摘要： A system and method for reducing harmonic noise caused by two or more noise sources by causing one or more loudspeakers to produce sounds that are at about the same frequencies as the noise and of substantially opposite phase. There is a noise canceller associated with each noise source. Each noise canceller includes a harmonic sine wave generator that generates an output sine wave. Each noise canceller also has an adaptive filter that uses a sine wave to create a noise reduction signal that is used to drive one or more transducers with their outputs directed to reduce noise caused by the noise sources. There is an overlap detector that compares the harmonic frequencies and, based on their proximity, alters the operation of one or more adaptive filters.

12. 发明公开

EP0361968A3 Noise cancellor 失效
标题翻译：噪音消除器
公开(公告)号：EP0361968A3
公开(公告)日：1991-03-06
申请号：EP89310000.8
申请日：1989-09-29
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Nagayasu, Katsuyoshi c/o Intellectual Property Div
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , G10K2210/106 , G10K2210/121 , G10K2210/30232 , G10K2210/3025 , G10K2210/3032 , G10K2210/3045 , G10K2210/3051 , G10K2210/3054 , G10K2210/503
摘要： A noise cancellor includes a first sensor (22) for detecting a noise generated form a driving device (10) and converting the noise to electric signals. A signal processor (25) receives the electric signals and forms control signals by multiplying the electric signals by a predetermined factor series. In response to the control signals, a speaker (30) produces sound which interferes with the noise so as to cancel the noise at an object point (13). A second sensor (26) detects sound at the object point and converts them to electric signals which are inputted to the signal processor. The signal processor switches the control mode, in accordance with a predetermined condition, to an adapting active control wherein the factor series is changed in response to the electric signal applied from the second sensor or an active control wherein the factor series is fixed.

13. 发明授权

US09679552B2 Active reduction of harmonic noise from multiple noise sources 有权
公开(公告)号：US09679552B2
公开(公告)日：2017-06-13
申请号：US15098863
申请日：2016-04-14
申请人： Bose Corporation
发明人： Alaganandan Ganeshkumar , Dennis D. Klug
IPC分类号： A61F11/06 , G10K11/178 , H04R3/00
CPC分类号： G10K11/178 , G10K2210/1282 , G10K2210/3028 , G10K2210/3032 , G10K2210/3054 , H04R3/002 , H04R2499/13
摘要： A system and method for reducing harmonic noise caused by two or more noise sources by causing one or more loudspeakers to produce sounds that are at about the same frequencies as the noise and of substantially opposite phase. There is a noise canceller associated with each noise source. Each noise canceller includes a harmonic sine wave generator that generates an output sine wave. Each noise canceller also has an adaptive filter that uses a sine wave to create a noise reduction signal that is used to drive one or more transducers with their outputs directed to reduce noise caused by the noise sources. There is an overlap detector that compares the harmonic frequencies and, based on their proximity, alters the operation of one or more adaptive filters.

14. 发明申请

US20150063581A1 ACTIVE NOISE REDUCTION DEVICE AND ACTIVE NOISE REDUCTION METHOD 有权
标题翻译：主动噪声减少装置和主动噪声减少方法
公开(公告)号：US20150063581A1
公开(公告)日：2015-03-05
申请号：US14391530
申请日：2013-06-25
申请人： Panasonic intellectual property Management co., Ltd
发明人： Mitsuhiro Tani , Toshiyuki Funayama , Mitsuru Kaitou
IPC分类号： H04R3/02
CPC分类号： H04R3/02 , G10K11/178 , G10K11/17821 , G10K11/17854 , G10K11/17881 , G10K2210/1282 , G10K2210/3054 , G10K2210/3055 , H04R3/00 , H04R2460/01 , H04R2499/13
摘要： An active noise reduction device is used with a secondary noise source that generates a secondary noise and an error signal source that outputs an error signal corresponding to a residual sound caused by interference between the secondary noise and a noise. A μ-adjustment unit calculates a step-size parameter for updating a filter coefficient of an adaptive filter by multiplying a standard step-size parameter by a ratio of a standard representative input value corresponding to amplitude of a signal to a representative input value corresponding to the amplitude of the signal.
摘要翻译：主动噪声降低装置与产生次级噪声的次级噪声源和误差信号源一起使用，该信号源输出对应于由次级噪声和噪声之间的干扰引起的残留声音的误差信号。 μ调整单元通过将标准步长参数乘以与信号幅度对应的标准代表性输入值与对应于信号的代表性输入值的比率来计算用于更新自适应滤波器的滤波器系数的步长参数信号的幅度。

15. 发明授权

US06216047B1 Adaptive control method for cyclic signal 有权
标题翻译：循环信号的自适应控制方法
公开(公告)号：US06216047B1
公开(公告)日：2001-04-10
申请号：US09174544
申请日：1998-10-19
申请人： Katsuhiro Goto
发明人： Katsuhiro Goto
IPC分类号： G05B1302
CPC分类号： G10K11/178 , G05B13/042 , G10K2210/3012 , G10K2210/3054 , G10K2210/503
摘要： An adaptive control method employs an adaptive signal generation algorithm 11 for generating an adaptive signal y(n) which cancels a cyclic signal y(n) at a measurement point 24, and an adaptive coefficient vector renewing algorithm 12 for renewing the amplitudes a(n) and phases &phgr;(n) of the adaptive signal y(n). The adaptive coefficient vector renewing algorithm 12 is quasi-normalized by a sum [A(&ohgr;)+&ggr;]. The A(&ohgr;) is a gain measurement of a transfer characteristic 23, and the &ggr; is a divergence prevention constant. Hence, in a frequency region where the gain A(&ohgr;) is high, a step size is small so that the stability of the adaptive control method can be enhanced. In a frequency region where the gain A(&ohgr;) is low, the step size is large so that the adaptability can be improved. As a result, the convergence stability and the characteristic following the frequency variation are compatible with each other.
摘要翻译：自适应控制方法采用自适应信号生成算法11，用于生成在测量点24消除循环信号y（n）的自适应信号y（n），以及用于更新幅度a（n）的自适应系数向量更新算法12 ）和自适应信号y（n）的相位phi（n）。自适应系数向量更新算法12通过和[A（ω）+γ]进行准归一化。 A（ω）是传递特性23的增益测量，γ是发散预防常数。因此，在增益A（ω）高的频率区域中，步长小，能够提高自适应控制方法的稳定性。在增益A（ω）低的频率区域中，台阶大，能够提高适应性。结果，收敛稳定性和频率变化之后的特性彼此兼容。

16. 发明授权

US5745580A Reduction of computational burden of adaptively updating control filter(s) in active systems 失效
标题翻译：减少主动系统中自适应更新控制滤波器的计算负担
公开(公告)号：US5745580A
公开(公告)日：1998-04-28
申请号：US334467
申请日：1994-11-04
申请人： Steve C. Southward , Lane R. Miller
发明人： Steve C. Southward , Lane R. Miller
IPC分类号： G10K11/178 , H03H21/00 , A61F11/06 , H03B29/00
CPC分类号： G10K11/1784 , H03H21/0012 , G10K2210/3011 , G10K2210/3017 , G10K2210/3026 , G10K2210/3027 , G10K2210/3031 , G10K2210/3032 , G10K2210/3042 , G10K2210/3049 , G10K2210/3053 , G10K2210/3054
摘要： An active control method and apparatus for controlling vibration or sound wherein the computational burden to adaptively update the control filter within the update model is reduced. The apparatus includes means for producing an input signal for input to the update model and the reduction block, means for generating an error sensor, and an output device for canceling sound and/or vibration at a selected location. The method uses a gradient descent algorithm such as the filtered-x LMS algorithm and replaces the long filter model with a shortened length filter model. Error signal information together with the output information from the shortened length filter model are used to update the coefficients of the control filter according to an update calculation method. The shortened filter model only contains frequency response information at the L frequencies of interest. Because of the reduced amount of information contained in the shortened filter model, more updates per unit of time can be performed on the control filter(s) or a smaller or fewer processors or CPU's may be utilized. The method has applicability to feed-forward and feed-back type systems and also to systems using a waveform generator for supplying the input signal. The reduction method may be implemented on-line or off-line.
摘要翻译：一种用于控制振动或声音的主动控制方法和装置，其中减少了在更新模型内自适应地更新控制滤波器的计算负担。该装置包括用于产生用于输入到更新模型和减小块的输入信号的装置，用于产生误差传感器的装置，以及用于在选定位置消除声音和/或振动的输出装置。该方法使用梯度下降算法，如过滤x LMS算法，并用缩短的长度过滤器模型替代长过滤器模型。误差信号信息与来自缩短的长度滤波器模型的输出信息一起用于根据更新计算方法来更新控制滤波器的系数。缩短的滤波器模型仅包含感兴趣的L个频率的频率响应信息。由于缩短的过滤器模型中包含的信息量减少，因此可以在控制过滤器上执行每单位时间更多的更新，或者可以使用更小或更少的处理器或CPU。该方法适用于前馈和反馈型系统，也适用于使用波形发生器提供输入信号的系统。还原方法可以在线或离线实现。

17. 发明授权

US09502020B1 Robust adaptive noise canceling (ANC) in a personal audio device 有权
标题翻译：个人音频设备中的鲁棒自适应噪声消除（ANC）
公开(公告)号：US09502020B1
公开(公告)日：2016-11-22
申请号：US14210589
申请日：2014-03-14
申请人： Cirrus Logic, Inc.
发明人： Ali Abdollahzadeh Milani , Jeffrey Alderson , Gautham Devendra Kamath , Yang Lu
IPC分类号： H04R29/00 , H03G3/00 , G10K11/16
CPC分类号： G10K11/16 , G10K11/178 , G10K11/17835 , G10K11/17881 , G10K2210/1081 , G10K2210/3016 , G10K2210/3028 , G10K2210/3045 , G10K2210/3054
摘要： An adaptive noise canceling (ANC) circuit adaptively generates an anti-noise signal that is injected into the speaker or other transducer output to cause cancellation of ambient audio sounds. At least one microphone provides an error signal indicative of the noise cancellation at the transducer, and the adaptive filter is adapted to minimize the error signal. In order to prevent improper adaptation or instabilities in one or both of the adaptive filters, spikes are detected in the error signal by comparing the error signal or its rate of change to a threshold. Therefore, if the magnitude of the coefficient error is greater than a threshold value for an update, the update is skipped. Alternatively the step size of the updates may be reduced. Similar criteria can be applied to a filter modeling the secondary path, based on detection applied to both the source audio and the error signal.
摘要翻译：自适应噪声消除（ANC）电路自适应地产生被注入到扬声器或其他换能器输出中的抗噪声信号，以引起环境声音的消除。至少一个麦克风提供指示换能器处的噪声消除的误差信号，并且自适应滤波器适于使误差信号最小化。为了防止一个或两个自适应滤波器中的不适当的适应或不稳定性，通过将误差信号或其变化率与阈值相比较，在误差信号中检测尖峰。因此，如果系数误差的大小大于更新的阈值，则跳过更新。或者，可以减少更新的步长。基于对源音频和误差信号两者的检测，可以将类似的标准应用于建模辅助路径的滤波器。

18. 发明授权

US09191739B2 Active reduction of harmonic noise from multiple rotating devices 有权
标题翻译：主动降低多个旋转装置的谐波噪声
公开(公告)号：US09191739B2
公开(公告)日：2015-11-17
申请号：US13849856
申请日：2013-03-25
申请人： Bose Corporation
发明人： Alaganandan Ganeshkumar , Dennis D. Klug
IPC分类号： A61F11/06 , H04R3/00 , G10K11/178
CPC分类号： H04R3/002 , G10K11/178 , G10K11/17854 , G10K11/17883 , G10K2210/1282 , G10K2210/3028 , G10K2210/3032 , G10K2210/3054
摘要： A system and method for reducing noise caused by two or more rotating devices by taking in input signals with frequencies that are related to the rotation rates of the rotating devices, and causing one or more loudspeakers to produce sounds that are at about the same frequencies as the noise and of substantially opposite phase. There is a noise canceller associated with each rotating device. Each noise canceller includes a harmonic frequency computer that computes a harmonic frequency and provides the harmonic frequency to a harmonic sine wave generator that generates an output sine wave. Each nose canceller also has an adaptive filter that uses a sine wave to create a noise reduction signal that is used to drive one or more transducers with their outputs directed to reduce noise caused by the rotating devices. There is an overlap detector that compares the harmonic frequencies and, based on their proximity, alters the operation of one or more adaptive filters.
摘要翻译：一种用于通过接收具有与旋转装置的旋转速率相关的频率的输入信号来减少由两个或更多个旋转装置引起的噪声的系统和方法，并且使一个或多个扬声器产生与大约相同频率的声音噪声和基本相反的相位。每个旋转装置都有一个噪音消除器。每个噪声消除器包括一个谐波频率计算机，它计算谐波频率并将谐波频率提供给产生输出正弦波的谐波正弦波发生器。每个鼻子消除器还具有自适应滤波器，其使用正弦波来产生噪声降低信号，该信号用于驱动一个或多个换能器，其输出被引导以减少由旋转装置引起的噪声。存在重叠检测器，其比较谐波频率，并且基于它们的接近度改变一个或多个自适应滤波器的操作。

19. 发明申请

US20150010163A1 Active Reduction of Harmonic Noise from Multiple Noise Sources 有权
标题翻译：主动降低多个噪声源的谐波噪声
公开(公告)号：US20150010163A1
公开(公告)日：2015-01-08
申请号：US14494852
申请日：2014-09-24
申请人： Bose Corporation
发明人： Alaganandan Ganeshkumar , Dennis D. Klug
IPC分类号： H04R3/00
CPC分类号： G10K11/178 , G10K2210/1282 , G10K2210/3028 , G10K2210/3032 , G10K2210/3054 , H04R3/002 , H04R2499/13
摘要： A system and method for reducing harmonic noise caused by two or more noise sources by causing one or more loudspeakers to produce sounds that are at about the same frequencies as the noise and of substantially opposite phase. There is a noise canceller associated with each noise source. Each noise canceller includes a harmonic sine wave generator that generates an output sine wave. Each noise canceller also has an adaptive filter that uses a sine wave to create a noise reduction signal that is used to drive one or more transducers with their outputs directed to reduce noise caused by the noise sources. There is an overlap detector that compares the harmonic frequencies and, based on their proximity, alters the operation of one or more adaptive filters.
摘要翻译：一种用于通过使一个或多个扬声器产生与噪声大致相同的频率和基本上相反的相位的声音来减少由两个或更多个噪声源引起的谐波噪声的系统和方法。每个噪声源都有一个噪声消除器。每个噪声消除器包括产生输出正弦波的谐波正弦波发生器。每个噪声消除器还具有自适应滤波器，其使用正弦波来产生噪声降低信号，该信号用于驱动一个或多个换能器，其输出被引导以减少由噪声源引起的噪声。存在重叠检测器，其比较谐波频率，并且基于它们的接近度改变一个或多个自适应滤波器的操作。

20. 发明授权

US5978824A Noise canceler 失效
标题翻译：噪音消除器
公开(公告)号：US5978824A
公开(公告)日：1999-11-02
申请号：US015525
申请日：1998-01-29
申请人： Shigeji Ikeda
发明人： Shigeji Ikeda
IPC分类号： H03H21/00 , G10K11/178 , G10L21/02 , H04B1/10 , H04B3/23 , G06F17/10
CPC分类号： G10K11/1784 , G10K2210/108 , G10K2210/3012 , G10K2210/3023 , G10K2210/3045 , G10K2210/3054 , G10L2021/02165 , G10L21/0216
摘要： A noise canceler of the present invention includes a signal-to-noise power ratio estimator to which a main signal and a reference signal are input. The estimator 10 estimates the sinal-to-noise power ratio of the main signal from the mean power of a desired signal contained in the main siganl and a mean power of a noise signal also contained in the main signal. In addition, the estimator estimates the signal-to-noise power ratio of the reference signal from the mean power of a desired signal contained in the reference signal and the mean power of a noise singal also contained in the reference signal. An adptive filter for estimating the noise signal of the main signal has its step size for coefficient updating controlled in accordance with the estimated signal-to-noise power ratio of the noise signal. On the other hand, an adptive filter for estimating the desired signal of the reference signal has its step size for coefficient updating controlled in accordance with the estimated signal-to-noise power ratio of the reference signal. Delay circuits are provided for compensating for a delay ascribable to a power averaging procedure which a signal-to-noise power ratio estimator executes to calculate the estimated siganl-to-noise power ratios.
摘要翻译：本发明的噪声消除器包括输入主信号和参考信号的信噪比功率比估计器。估计器10从主信号中包含的期望信号的平均功率和主信号中也包含的噪声信号的平均功率估计主信号的信噪比功率比。此外，估计器从参考信号中包含的期望信号的平均功率和噪声信号的平均功率估计参考信号的信噪比功率比也包含在参考信号中。用于估计主信号的噪声信号的适应滤波器具有根据噪声信号的估计信噪比功率比来控制系数更新的步长。另一方面，用于估计参考信号的期望信号的适应滤波器具有根据参考信号的估计的信噪比功率比来控制系数更新的步长。延迟电路被提供用于补偿归因于功率平均过程的延迟，信号噪声功率比估计器执行以计算估计的信噪比功率比。

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