公开(公告)号：WO2013169453A2

公开(公告)日：2013-11-14

申请号：PCT/US2013/037049

申请日：2013-04-18

Applicant: CIRRUS LOGIC, INC.

Inventor： ALDERSON, Jeffrey ,  HENDRIX, Jon, D. ,  ZHOU, Dayong

IPC: G10K11/178

CPC classification number: H04R3/002 ,  G10K11/178 ,  G10K2210/108 ,  G10K2210/3012 ,  G10K2210/30231 ,  G10K2210/3025 ,  G10K2210/3028 ,  G10K2210/30391 ,  G10K2210/3226 ,  G10K2210/503 ,  H04R1/1083 ,  H04R3/00

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 detects frequency-dependent characteristics in and/or direction of the ambient sounds and alters adaptation of the noise canceling circuit in response to the detection.

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他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配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）功能的处理电路还检测环境声音和/或方向上的频率相关特性，并且响应于检测改变噪声消除电路的适应。

公开(公告)号：WO2012075343A3

公开(公告)日：2012-06-07

申请号：PCT/US2011/062968

申请日：2011-12-01

Applicant: CIRRUS LOGIC, INC.

Inventor： HENDRIX, Joh, D. ,  MILANI, Abdollahzadeh ,  KWATRA, Nitin ,  ZHOU, Dayong ,  LU, Yang ,  ALDERSON, Jeffrey

IPC: G10K11/178

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.