公开(公告)号：HK1170839A1

公开(公告)日：2013-03-08

申请号：HK12111659

申请日：2012-11-16

Applicant: APPLE INC

Inventor： CHEN SHAOHAI ,  NICHOLSON GUY C ,  PO BRUCE C

IPC: G10L20060101 ,  H04M20060101

公开(公告)号：AU2011261559A1

公开(公告)日：2012-11-01

申请号：AU2011261559

申请日：2011-05-31

Applicant: APPLE INC

Inventor： NICHOLSON GUY C

IPC: G10K11/178

Abstract: Active noise cancellation (ANC) circuitry is coupled to the input of an earpiece speaker in a portable audio device, to control the ambient acoustic noise outside of the device and that may be heard by a user of the device. A microphone is to pickup sound emitted from the earpiece speaker, as well as the ambient acoustic noise. Control circuitry deactivates the ANC in response to determining that an estimate of how much sound emitted from the earpiece speaker has been corrupted by noise indicates insufficient corruption by noise. In another embodiment, the ANC decision is in response to determining that an estimate of the ambient noise level is greater than a threshold level of an audio artifact that could be induced by the ANC. Other embodiments are also described and claimed.

公开(公告)号：WO2011153165A3

公开(公告)日：2012-07-26

申请号：PCT/US2011038617

申请日：2011-05-31

Applicant: APPLE INC ,  NICHOLSON GUY C

Inventor： NICHOLSON GUY C

IPC: G10K11/178

CPC classification number: G10K11/175 ,  G10K11/17833 ,  G10K2210/1081 ,  G10K2210/3026

Abstract: Active noise cancellation (ANC) circuitry is coupled to the input of an earpiece speaker in a portable audio device, to control the ambient acoustic noise outside of the device and that may be heard by a user of the device. A microphone is to pickup sound emitted from the earpiece speaker, as well as the ambient acoustic noise. Control circuitry deactivates the ANC in response to determining that an estimate of how much sound emitted from the earpiece speaker has been corrupted by noise indicates insufficient corruption by noise. In another embodiment, the ANC decision is in response to determining that an estimate of the ambient noise level is greater than a threshold level of an audio artifact that could be induced by the ANC. Other embodiments are also described and claimed.

Abstract translation: 有源噪声消除（ANC）电路耦合到便携式音频设备中的耳机扬声器的输入端，以控制设备外部的环境声学噪声，并且该设备的用户可能会听到。 麦克风是用于拾取从耳机扬声器发出的声音以及环境噪声。 响应于确定从耳机扬声器发射的声音已经被噪声破坏的响应，控制电路使ANC取消激活，表明噪声不足。 在另一个实施例中，ANC决定是响应于确定环境噪声电平的估计大于可能由ANC引起的音频伪像的阈值水平。 还描述和要求保护其他实施例。