公开(公告)号：US09704472B2

公开(公告)日：2017-07-11

申请号：US14101893

申请日：2013-12-10

Applicant: Cirrus Logic, Inc.

Inventor： Nitin Kwatra

IPC: G10K11/178 ,  H04R1/10 ,  H04R25/00

CPC classification number: G10K11/178 ,  G10K11/17817 ,  G10K11/17881 ,  G10K11/17885 ,  G10K2210/1081 ,  H04R1/1083 ,  H04R25/00 ,  H04R2460/01 ,  H04R2460/15

Abstract: Systems and methods of the present disclosure include analyzing and comparing transfer functions associated with a plurality of electro-acoustic paths for transducers of a personal audio device to determine proximity of the transducers to respective ears of a listener of the personal audio device, quality of acoustic seals associated with the transducers, and for one or more other purposes.

公开(公告)号：US09368099B2

公开(公告)日：2016-06-14

申请号：US14228322

申请日：2014-03-28

Applicant: Cirrus Logic, Inc.

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

IPC: G10K11/16 ,  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.

公开(公告)号：US20160063988A1

公开(公告)日：2016-03-03

申请号：US14840831

申请日：2015-08-31

Applicant: Cirrus Logic, Inc.

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

IPC: G10K11/178 ,  H04R1/10

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，以防止或补救这些条件。

公开(公告)号：US20140211953A1

公开(公告)日：2014-07-31

申请号：US14228322

申请日：2014-03-28

Applicant: Cirrus Logic, Inc.

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

IPC: 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。