公开(公告)号：US08948407B2

公开(公告)日：2015-02-03

申请号：US13333484

申请日：2011-12-21

Applicant: Jeffrey Alderson ,  Nitin Kwatra ,  Gautham Devendra Kamath ,  Ali Abdollahzadeh Milani ,  John L. Melanson

Inventor： Jeffrey Alderson ,  Nitin Kwatra ,  Gautham Devendra Kamath ,  Ali Abdollahzadeh Milani ,  John L. Melanson

IPC: A61F11/06 ,  G10K11/178

CPC classification number: G10K11/178 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/1082 ,  G10K2210/3017 ,  G10K2210/3028 ,  G10K2210/3035 ,  G10K2210/3049 ,  G10K2210/3056 ,  G10K2210/511

Abstract: 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. An error microphone may also be 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. A processing circuit that performs the adaptive noise canceling (ANC) function also either adjusts the frequency response of the anti-noise signal with respect to the reference microphone signal, and/or by adjusting the response of the adaptive filter independent of the adaptation provided by the reference microphone signal.

Abstract translation: 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。 还可以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通过换能器的噪声消除电路的电声路径。 执行自适应噪声消除（ANC）功能的处理电路还可以相对于参考麦克风信号调整抗噪声信号的频率响应，和/或通过调节独立于由 参考麦克风信号。

公开(公告)号：US20120308028A1

公开(公告)日：2012-12-06

申请号：US13472755

申请日：2012-05-16

Applicant: Nitin Kwatra ,  Ali Abdollahzadeh Milani ,  Jeffrey Alderson

Inventor： Nitin Kwatra ,  Ali Abdollahzadeh Milani ,  Jeffrey Alderson

IPC: G10K11/16

CPC classification number: 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

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20120308027A1

公开(公告)日：2012-12-06

申请号：US13458585

申请日：2012-04-27

Applicant: Nitin Kwatra

Inventor： Nitin Kwatra

IPC: G10K11/16

CPC classification number: G10K11/178 ,  G10K11/17817 ,  G10K2210/108 ,  G10K2210/3049

Abstract: A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) 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. An error microphone is also provided proximate the speaker to provide an error signal indicative of the effectiveness of the noise cancellation. A secondary path estimating adaptive filter is used to estimate the electro-acoustical path from the noise canceling circuit through the transducer so that source audio can be removed from the error signal. Noise is injected either continuously and inaudibly below the source audio, or in response to detection that the source audio is low in amplitude, so that the adaptation of the secondary path estimating adaptive filter can be maintained, irrespective of the presence and amplitude of the source audio.

Abstract translation: 诸如无线电话的个人音频设备包括自适应噪声消除（ANC）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扬声器或其他换能器输出以引起取消 的环境音频声音。 在扬声器附近还提供误差麦克风以提供指示噪声消除的有效性的误差信号。 二次路径估计自适应滤波器用于估计通过换能器的噪声消除电路的电声路径，从而可以从误差信号中去除源音频。 噪声被连续地和无声地地注入到源音频之下，或者响应于源音频的振幅低的响应，从而可以维持二次路径估计自适应滤波器的适应，而不管源的存在和幅度如何 音频。

公开(公告)号：US20120308024A1

公开(公告)日：2012-12-06

申请号：US13333484

申请日：2011-12-21

Applicant: Jeffrey Alderson ,  Nitin Kwatra ,  Gautham Devendra Kamath ,  Ali Abdollahzaden Milani ,  John L. Melanson

Inventor： Jeffrey Alderson ,  Nitin Kwatra ,  Gautham Devendra Kamath ,  Ali Abdollahzaden Milani ,  John L. Melanson

IPC: G10K11/16

CPC classification number: G10K11/178 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/1082 ,  G10K2210/3017 ,  G10K2210/3028 ,  G10K2210/3035 ,  G10K2210/3049 ,  G10K2210/3056 ,  G10K2210/511

Abstract: 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. An error microphone may also be 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. A processing circuit that performs the adaptive noise canceling (ANC) function also either adjusts the frequency response of the anti-noise signal with respect to the reference microphone signal, and/or by adjusting the response of the adaptive filter independent of the adaptation provided by the reference microphone signal.

Abstract translation: 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。 还可以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通过换能器的噪声消除电路的电声路径。 执行自适应噪声消除（ANC）功能的处理电路还可以相对于参考麦克风信号调整抗噪声信号的频率响应，和/或通过调节独立于由 参考麦克风信号。

公开(公告)号：US09824677B2

公开(公告)日：2017-11-21

申请号：US13472755

申请日：2012-05-16

Applicant: Nitin Kwatra ,  Ali Abdollahzadeh Milani ,  Jeffrey Alderson

Inventor： Nitin Kwatra ,  Ali Abdollahzadeh Milani ,  Jeffrey Alderson

IPC: G10K11/16 ,  G10K11/178 ,  G10L21/0208 ,  G10L21/0364

CPC classification number: 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

Abstract: 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.

公开(公告)号：US09142207B2

公开(公告)日：2015-09-22

申请号：US13309494

申请日：2011-12-01

Applicant: Jon D. Hendrix ,  Ali Abdollahzadeh Milani ,  Nitin Kwatra ,  Dayong Zhou ,  Yang Lu ,  Jeffrey Alderson

Inventor： Jon D. Hendrix ,  Ali Abdollahzadeh Milani ,  Nitin Kwatra ,  Dayong Zhou ,  Yang Lu ,  Jeffrey Alderson

IPC: G10K11/16 ,  G10K11/178

CPC classification number: G10K11/1784 ,  G10K11/178 ,  G10K2210/108 ,  G10K2210/1081 ,  G10K2210/3017 ,  G10K2210/3045 ,  G10K2210/3216 ,  G10K2210/3226 ,  G10K2210/504 ,  H04R1/1083 ,  H04R2460/01 ,  H04R2499/11

Abstract: A personal audio device, such as a wireless telephone, includes an adaptive noise canceling (ANC) 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. An error microphone is also provided proximate the speaker to measure the ambient sounds and transducer output near the transducer, thus providing an indication of the effectiveness of the noise canceling. A processing circuit uses the reference and/or error microphone, optionally along with a microphone provided for capturing near-end speech, to determine whether the ANC circuit is incorrectly adapting or may incorrectly adapt to the instant acoustic environment and/or whether the anti-noise signal may be incorrect and/or disruptive and then take action in the processing circuit to prevent or remedy such conditions.

Abstract translation: 诸如无线电话的个人音频设备包括自适应噪声消除（ANC）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扬声器或其他换能器输出以引起取消 的环境音频声音。 在扬声器附近还提供误差麦克风以测量传感器附近的环境声音和换能器输出，从而提供噪声消除的有效性的指示。 处理电路使用参考和/或误差麦克风，可选地连同提供用于捕获近端语音的麦克风，以确定ANC电路是否不正确地适配或可能不正确地适应于即时声学环境和/ 噪声信号可能不正确和/或破坏，然后在处理电路中采取行动，以防止或补救这种情况。

公开(公告)号：US20120308021A1

公开(公告)日：2012-12-06

申请号：US13249687

申请日：2011-09-30

Applicant: Nitin Kwatra ,  Jon D. Hendrix

Inventor： Nitin Kwatra ,  Jon D. Hendrix

IPC: G10K11/16

CPC classification number: G10K11/178 ,  G10K11/17833 ,  G10K2210/3017 ,  G10K2210/3037 ,  G10K2210/3039 ,  G10K2210/3045 ,  G10K2210/3213 ,  G10K2210/503

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US08958571B2

公开(公告)日：2015-02-17

申请号：US13249711

申请日：2011-09-30

Applicant: Nitin Kwatra ,  Jeffrey Alderson ,  Jon D. Hendrix

Inventor： Nitin Kwatra ,  Jeffrey Alderson ,  Jon D. Hendrix

IPC: G10L15/00 ,  G10L15/20 ,  G10L21/00 ,  G10L21/02 ,  H04M1/00 ,  A61F11/06 ,  G10K11/16 ,  H03B29/00 ,  H02B1/00 ,  H04R3/00 ,  H04R21/02 ,  H04B1/00 ,  G10K11/178 ,  H04R25/00 ,  H04B3/20 ,  H04R29/00 ,  H04B15/00 ,  H04R3/02 ,  H03G3/20 ,  H04R5/00

CPC classification number: G10L21/0208 ,  G10K11/175 ,  G10K11/178 ,  G10K2210/108 ,  G10K2210/30231 ,  G10K2210/30391 ,  G10K2210/503 ,  H04M1/20

Abstract: 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. An error microphone may also be provided proximate the speaker to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit uses the reference and/or error microphone, optionally along with a microphone provided for capturing near-end speech, to determine whether one of the reference or error microphones is obstructed by comparing their received signal content and takes action to avoid generation of erroneous anti-noise.

Abstract translation: 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。 还可以在扬声器附近提供误差麦克风以估计从噪声消除电路通过换能器的电声路径。 处理电路使用参考和/或误差麦克风，可选地与提供用于捕获近端语音的麦克风一起，通过比较其接收的信号内容来确定参考或误差麦克风中的一个是否被阻挡，并采取行动以避免产生 错误的抗噪声。

公开(公告)号：US08848936B2

公开(公告)日：2014-09-30

申请号：US13249687

申请日：2011-09-30

Applicant: Nitin Kwatra ,  Jon D. Hendrix

Inventor： Nitin Kwatra ,  Jon D. Hendrix

IPC: G10K11/16 ,  G10K11/178

CPC classification number: G10K11/178 ,  G10K11/17833 ,  G10K2210/3017 ,  G10K2210/3037 ,  G10K2210/3039 ,  G10K2210/3045 ,  G10K2210/3213 ,  G10K2210/503

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20120310640A1

公开(公告)日：2012-12-06

申请号：US13249711

申请日：2011-09-30

Applicant: Nitin Kwatra ,  Jeffrey Alderson ,  Jon D. Hendrix

Inventor： Nitin Kwatra ,  Jeffrey Alderson ,  Jon D. Hendrix

IPC: G10L15/20 ,  G10K11/16

CPC classification number: G10L21/0208 ,  G10K11/175 ,  G10K11/178 ,  G10K2210/108 ,  G10K2210/30231 ,  G10K2210/30391 ,  G10K2210/503 ,  H04M1/20

Abstract: 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. An error microphone may also be provided proximate the speaker to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit uses the reference and/or error microphone, optionally along with a microphone provided for capturing near-end speech, to determine whether one of the reference or error microphones is obstructed by comparing their received signal content and takes action to avoid generation of erroneous anti-noise.

Abstract translation: 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。 还可以在扬声器附近提供误差麦克风以估计从噪声消除电路通过换能器的电声路径。 处理电路使用参考和/或误差麦克风，可选地与提供用于捕获近端语音的麦克风一起，通过比较其接收的信号内容来确定参考或误差麦克风中的一个是否被阻挡，并采取行动以避免产生 错误的抗噪声。