公开(公告)号：US09484010B2

公开(公告)日：2016-11-01

申请号：US13977253

申请日：2011-01-06

申请人： Manabu Nohara ,  Yoshiki Ohta ,  Kensaku Obata ,  Yusuke Soga

发明人： Manabu Nohara ,  Yoshiki Ohta ,  Kensaku Obata ,  Yusuke Soga

IPC分类号： G10K11/178

CPC分类号： G10K11/178 ,  G10K11/17883 ,  G10K2210/1282 ,  G10K2210/3023 ,  G10K2210/3028

摘要： An active vibration noise control device obtains error signals corresponding to a cancellation error between vibration noise and control sounds generated by multiple speakers, from microphone(s), and actively controls the vibration noise. A basic signal generating unit generates a basic signal based on a vibration noise frequency. An adaptive notch filter unit generates control signals provided to each of the multiple speakers by applying a filter coefficient to the basic signal. A reference signal generating unit generates a reference signal from the basic signal based on multiple transfer characteristics from the multiple speakers to the one or more microphones. A filter coefficient updating unit updates the filter coefficient used by the adaptive notch filter unit so as to minimize the error signals. A controlling unit changes amplitude of the control signals of the speakers based on a similarity between the transfer characteristics and characteristics of the vibration noise.

摘要翻译： 主动振动噪声控制装置从麦克风获得对应于由多个扬声器产生的振动噪声和控制声之间的抵消误差的误差信号，并且主动地控制振动噪声。 基本信号生成单元基于振动噪声频率生成基本信号。 自适应陷波滤波器单元通过对基本信号施加滤波器系数来产生提供给多个扬声器中的每一个的控制信号。 参考信号生成单元基于从多个扬声器到一个或多个麦克风的多个传送特性，从基本信号生成参考信号。 滤波器系数更新单元更新由自适应陷波滤波器单元使用的滤波器系数，以使误差信号最小化。 控制单元基于传递特性和振动噪声的特性之间的相似度来改变扬声器的控制信号的幅度。

公开(公告)号：US20130279712A1

公开(公告)日：2013-10-24

申请号：US13977253

申请日：2011-01-06

申请人： Manabu Nohara ,  Yoshiki Ohta ,  Kensaku Obata ,  Yusuke Soga

发明人： Manabu Nohara ,  Yoshiki Ohta ,  Kensaku Obata ,  Yusuke Soga

IPC分类号： G10K11/178

CPC分类号： G10K11/178 ,  G10K11/17883 ,  G10K2210/1282 ,  G10K2210/3023 ,  G10K2210/3028

摘要： An active vibration noise control device obtains error signals corresponding to a cancellation error between vibration noise and control sounds generated by multiple speakers, from microphone(s), and actively controls the vibration noise. A basic signal generating unit generates a basic signal based on a vibration noise frequency. An adaptive notch filter unit generates control signals provided to each of the multiple speakers by applying a filter coefficient to the basic signal. A reference signal generating unit generates a reference signal from the basic signal based on multiple transfer characteristics from the multiple speakers to the one or more microphones. A filter coefficient updating unit updates the filter coefficient used by the adaptive notch filter unit so as to minimize the error signals. A controlling unit changes amplitude of the control signals of the speakers based on a similarity between the transfer characteristics and characteristics of the vibration noise.

摘要翻译： 主动振动噪声控制装置从麦克风获得对应于由多个扬声器产生的振动噪声和控制声之间的抵消误差的误差信号，并且主动地控制振动噪声。 基本信号生成单元基于振动噪声频率生成基本信号。 自适应陷波滤波器单元通过对基本信号施加滤波器系数来产生提供给多个扬声器中的每一个的控制信号。 参考信号生成单元基于从多个扬声器到一个或多个麦克风的多个传送特性，从基本信号生成参考信号。 滤波器系数更新单元更新由自适应陷波滤波器单元使用的滤波器系数，以使误差信号最小化。 控制单元基于传递特性和振动噪声的特性之间的相似度来改变扬声器的控制信号的幅度。

公开(公告)号：US20120195439A1

公开(公告)日：2012-08-02

申请号：US13499790

申请日：2009-10-07

申请人： Yoshiki Ohta ,  Manabu Nohara ,  Yusuke Soga ,  Kensaku Obata ,  Akihiro Iseki

发明人： Yoshiki Ohta ,  Manabu Nohara ,  Yusuke Soga ,  Kensaku Obata ,  Akihiro Iseki

IPC分类号： G10K11/16

CPC分类号： G10K11/178 ,  G10K2210/1282 ,  G10K2210/3054

摘要： An active vibration noise control device is preferably used for cancelling a vibration noise by making a speaker generate a control sound. The active vibration noise control device includes a step-size parameter changing unit which changes a step-size parameter used for updating a filter coefficient. The step-size parameter changing unit calculates a parameter-for-change based on the filter coefficient updated by using a basic step-size parameter, and changes the basic step-size parameter by a minimum value in the previously calculated parameter-for-change. Therefore, it is possible to appropriately change the step-size parameter by using the minimum value of the parameter-for-change. Hence, it becomes possible to effectively suppress a divergence of an adaptive notch filter due to a secular change of the speaker.

摘要翻译： 主动振动噪声控制装置优选地通过使扬声器产生控制声音来消除振动噪声。 主动振动噪声控制装置包括改变用于更新滤波器系数的步长参数的步长参数改变单元。 步长参数改变单元基于通过使用基本步长参数更新的滤波器系数来计算变化参数，并且将基本步长参数改变为先前计算的变化参数中的最小值 。 因此，可以通过使用变更参数的最小值来适当地改变步长参数。 因此，可以有效地抑制由于扬声器的长期变化引起的自适应陷波滤波器的发散。

公开(公告)号：US20120033821A1

公开(公告)日：2012-02-09

申请号：US13264065

申请日：2009-04-15

申请人： Yoshiki Ohta ,  Yoshitomo Imanishi ,  Tomomi Hasegawa ,  Manabu Nohara ,  Yusuke Soga

发明人： Yoshiki Ohta ,  Yoshitomo Imanishi ,  Tomomi Hasegawa ,  Manabu Nohara ,  Yusuke Soga

IPC分类号： G10K11/16

CPC分类号： G10K11/1782 ,  G10K11/17854 ,  G10K11/17883 ,  G10K2210/1282 ,  G10K2210/503 ,  H04R2499/13 ,  H04S7/301

摘要： An active vibration noise control device having a pair of speakers, including: a basic signal generating unit generating a basic signal based on a vibration noise frequency; an adaptive notch filter generating a first control signal provided to one speaker using a first filter coefficient and generating a second control signal provided to the other speaker using a second filter coefficient to cancel the generated vibration noise; a microphone detecting cancellation error between the vibration noise and the control sounds and outputting an error signal; a reference signal generating unit generating a reference signal based on a transfer function from the speakers to the microphone; a filter coefficient updating unit updating first and second filter coefficients, minimize the error signal; and a phase difference limiting unit limiting a phase difference between control sounds generated by different speakers. Therefore, it becomes possible to appropriately ensure a uniform and wide noise-cancelled area.

摘要翻译： 一种具有一对扬声器的主动振动噪声控制装置，包括：基本信号产生单元，其基于振动噪声频率产生基本信号; 自适应陷波滤波器，使用第一滤波器系数产生提供给一个扬声器的第一控制信号，并使用第二滤波器系数产生提供给另一个扬声器的第二控制信号，以消除所产生的振动噪声; 麦克风检测振动噪声和控制声音之间的消除误差，并输出误差信号; 参考信号产生单元，基于从扬声器到麦克风的传递函数产生参考信号; 滤波器系数更新单元更新第一和第二滤波器系数，使误差信号最小化; 以及限制由不同扬声器产生的控制声音之间的相位差的相位差限制单元。 因此，可以适当地确保均匀且宽的噪声消除区域。

公开(公告)号：US09226066B2

公开(公告)日：2015-12-29

申请号：US13640244

申请日：2010-04-09

申请人： Yoshiki Ohta ,  Manabu Nohara ,  Yusuke Soga ,  Shin Hasegawa ,  Hisashi Kihara

发明人： Yoshiki Ohta ,  Manabu Nohara ,  Yusuke Soga ,  Shin Hasegawa ,  Hisashi Kihara

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

CPC分类号： H04R3/002 ,  G10K11/178 ,  G10K2210/3016 ,  G10K2210/3022 ,  G10K2210/3057

摘要： An active vibration noise control device is preferably used for canceling a vibration noise by making a speaker generate a control sound. Concretely, the active vibration noise control device includes an attenuating unit which attenuates a control signal generated by an adaptive notch filter, and provides the attenuated control signal to the speaker, when amplitude of a filter coefficient is larger than a threshold. Therefore, it is possible to suppress continuous ups and downs of the filter coefficient during an occurrence of an abnormality. Hence, it becomes possible to appropriately suppress an occurrence of a cyclic abnormal sound and an increase in the vibration noise during the occurrence of the abnormality.

摘要翻译： 主动振动噪声控制装置优选地通过使扬声器产生控制声音来消除振动噪声。 具体地，主动振动噪声控制装置包括：衰减单元，衰减由自适应陷波滤波器产生的控制信号，并且当滤波器系数的幅度大于阈值时，将衰减的控制信号提供给扬声器。 因此，可以在发生异常时抑制滤波器系数的连续上升和下降。 因此，可以适当地抑制异常发生期间的循环异常声音的发生和振动噪声的增加。

公开(公告)号：US08891781B2

公开(公告)日：2014-11-18

申请号：US13264065

申请日：2009-04-15

申请人： Yoshiki Ohta ,  Yoshitomo Imanishi ,  Tomomi Hasegawa ,  Manabu Nohara ,  Yusuke Soga

发明人： Yoshiki Ohta ,  Yoshitomo Imanishi ,  Tomomi Hasegawa ,  Manabu Nohara ,  Yusuke Soga

IPC分类号： G10K11/16 ,  G10K11/178 ,  A61F11/06 ,  H04S7/00

CPC分类号： G10K11/1782 ,  G10K11/17854 ,  G10K11/17883 ,  G10K2210/1282 ,  G10K2210/503 ,  H04R2499/13 ,  H04S7/301

摘要： An active vibration noise control device having a pair of speakers, including: a basic signal generating unit generating a basic signal based on a vibration noise frequency; an adaptive notch filter generating a first control signal provided to one speaker using a first filter coefficient and generating a second control signal provided to the other speaker using a second filter coefficient to cancel the generated vibration noise; a microphone detecting cancellation error between the vibration noise and the control sounds and outputting an error signal; a reference signal generating unit generating a reference signal based on a transfer function from the speakers to the microphone; a filter coefficient updating unit updating first and second filter coefficients, minimize the error signal; and a phase difference limiting unit limiting a phase difference between control sounds generated by different speakers. Therefore, it becomes possible to appropriately ensure a uniform and wide noise-cancelled area.

摘要翻译： 一种具有一对扬声器的主动振动噪声控制装置，包括：基本信号产生单元，其基于振动噪声频率产生基本信号; 自适应陷波滤波器，使用第一滤波器系数产生提供给一个扬声器的第一控制信号，并使用第二滤波器系数产生提供给另一个扬声器的第二控制信号，以消除所产生的振动噪声; 麦克风检测振动噪声和控制声音之间的消除误差，并输出误差信号; 参考信号产生单元，基于从扬声器到麦克风的传递函数产生参考信号; 滤波器系数更新单元更新第一和第二滤波器系数，使误差信号最小化; 以及限制由不同扬声器产生的控制声音之间的相位差的相位差限制单元。 因此，可以适当地确保均匀且宽的噪声消除区域。

公开(公告)号：US20120300955A1

公开(公告)日：2012-11-29

申请号：US13578727

申请日：2010-02-15

申请人： Akihiro Iseki ,  Yoshiki Ohta ,  Yoshitomo Imanishi ,  Kensaku Obata

发明人： Akihiro Iseki ,  Yoshiki Ohta ,  Yoshitomo Imanishi ,  Kensaku Obata

IPC分类号： G10K11/36

CPC分类号： G10K11/1786 ,  G10K11/178 ,  G10K2210/12821 ,  H04R3/02

摘要： An active vibration noise control device cancels vibration noise by making plural speakers generate control sounds. The active vibration noise control device selects one or more speakers which output the control sounds, from plural speakers, based on a relationship between (1) a first phase difference which corresponds to a difference between phase characteristics of the vibration noise from a vibration noise source to an evaluation point and phase characteristics of the vibration noise from the vibration noise source to a pseudo evaluation point and (2) a second phase difference for each of the plural speakers corresponding to a difference between phase characteristics of the control sound from the speaker to the evaluation point and phase characteristics of the control sound from the speaker to the pseudo evaluation point. Therefore, it stably decreases the vibration noise at the pseudo evaluation point independently of a frequency band of the vibration noise.

摘要翻译： 主动振动噪声控制装置通过使多个扬声器产生控制声音来消除振动噪声。 主动振动噪声控制装置根据（1）对应于来自振动噪声源的振动噪声的相位特性之差的第一相位差之间的关系，从多个扬声器中选择输出控制声音的一个或多个扬声器 涉及从振动噪声源到伪评估点的振动噪声的评估点和相位特性，以及（2）对应于来自扬声器的控制声音的相位特性之间的差异的多个扬声器中的每一个的第二相位差 控制声音从扬声器到伪评估点的评估点和相位特性。 因此，独立于振动噪声的频带，可以稳定地降低伪评估点的振动噪声。

公开(公告)号：US20090232321A1

公开(公告)日：2009-09-17

申请号：US11994067

申请日：2006-06-14

申请人： Yoshiki Ohta ,  Kensaku Obata

发明人： Yoshiki Ohta ,  Kensaku Obata

IPC分类号： H03G3/00

CPC分类号： H04S5/02

摘要： An audio signal processing apparatus includes a cutout unit, a correlation calculating unit, a spectrum calculating unit, a coefficient calculating unit, and an assigning unit. The cutout unit cuts out audio signals of plural channels by a time frame. The correlation calculating unit calculates a correlation value between respective signals of the plural channels included in a predetermined time frame cut out by the cutout unit. The spectrum calculating unit calculates spectrum information indicative of spectral characteristics concerning a signal of a given channel cut out by the cutout unit. The coefficient calculating unit calculates a coefficient to be multiplied by the signal of the given channel, based on the correlation value and the spectrum information. The assigning unit multiplies the coefficient by the signal of the given channel and assigns the multiplied signal to channels other than the given channel.

摘要翻译： 音频信号处理装置包括切出单元，相关计算单元，频谱计算单元，系数计算单元和分配单元。 切出单元按时间间隔切出多个频道的音频信号。 相关计算单元计算由切出单元切出的预定时间帧中包括的多个频道的各个信号之间的相关值。 频谱计算单元计算指示关于由切出单元切出的给定频道的信号的频谱特性的频谱信息。 系数计算单元基于相关值和频谱信息来计算要乘以给定信道的信号的系数。 分配单元将系数乘以给定信道的信号，并将相乘的信号分配给除了给定信道之外的信道。

公开(公告)号：US20110058684A1

公开(公告)日：2011-03-10

申请号：US12991478

申请日：2008-05-27

申请人： Yoshiki Ohta ,  Kensaku Obata

发明人： Yoshiki Ohta ,  Kensaku Obata

IPC分类号： H04R1/40

CPC分类号： H04S1/00 ,  H04R2499/13

摘要： An audio reproduction device reproduces a one-channel signal from two speakers arranged in a sound field. The one-channel input signal is delayed by a delay element. The delay element performs a delay with different delay amount for a plurality of frequency bands. The signal delayed by the delay element is outputted to one of the two speakers and the input signal is directly outputted to the other one of the two speakers.

摘要翻译： 音频再现装置再现来自布置在声场中的两个扬声器的单声道信号。 单通道输入信号被延迟元件延迟。 延迟元件对于多个频带执行具有不同延迟量的延迟。 由延迟元件延迟的信号被输出到两个扬声器中的一个，并且输入信号被直接输出到两个扬声器中的另一个。

公开(公告)号：US09318095B2

公开(公告)日：2016-04-19

申请号：US13579042

申请日：2010-02-18

申请人： Kensaku Obata ,  Yoshiki Ohta ,  Yoshitomo Imanishi ,  Akihiro Iseki

发明人： Kensaku Obata ,  Yoshiki Ohta ,  Yoshitomo Imanishi ,  Akihiro Iseki

IPC分类号： A61F11/06 ,  G10K11/178

CPC分类号： G10K11/1786 ,  G10K11/178 ,  G10K2210/1282 ,  G10K2210/3056 ,  G10K2210/503

摘要： The disclosed active vibration noise control device is suitable for use in cancelling out vibration noise by outputting control noise from a plurality of speakers. When a vibration noise frequency is in a dip bandwidth, the active vibration noise control device alters the step size parameters used to update the filter coefficient at at least one filter coefficient update means from among a plurality of filter coefficient update means. Thus, the filter coefficient update speed can be retarded in unstable dip bandwidths, enabling loss in silencing effect which occurs during dip characteristics to be appropriately reduced.

摘要翻译： 所公开的主动振动噪声控制装置适用于通过从多个扬声器输出控制噪声来消除振动噪声。 当振动噪声频率处于倾斜带宽时，主动振动噪声控制装置从多个滤波器系数更新装置中改变用于更新至少一个滤波器系数更新装置的滤波器系数的步长参数。 因此，在不稳定的浸渍带宽中可以延迟滤波器系数更新速度，能够适当降低在浸渍特性期间发生的消音效应的损失。