公开(公告)号：US09129586B2

公开(公告)日：2015-09-08

申请号：US13709919

申请日：2012-12-10

Applicant: Apple Inc.

Inventor： Vladan Bajic ,  Thomas M. Jensen

IPC: G10K11/00 ,  G10K11/178

CPC classification number: G10K11/002 ,  G10K11/178 ,  G10K11/17881 ,  G10K2210/1081 ,  G10K2210/30231 ,  G10K2210/3028 ,  G10K2210/511

Abstract: An active noise control (ANC) processor has an adaptive filter that uses a reference signal to produce an anti-noise signal, and an error signal to evaluate cancellation performance. An adaptive filter algorithm engine configures the filter coefficients of the adaptive filter, in accordance with pre-shaped versions of the error and reference signals. The pre-shaping filter has a high-pass transfer function and enables the adaptive algorithm engine to increase noise cancellation performance in a high frequency band during the presence of focused or narrow-band noise energy in a low frequency band. Other embodiments are also described and claimed.

Abstract translation: 主动噪声控制（ANC）处理器具有使用参考信号产生抗噪声信号的自适应滤波器和用于评估取消性能的误差信号。 自适应滤波器算法引擎根据预先形状的错误和参考信号来配置自适应滤波器的滤波器系数。 预成形滤波器具有高通传递函数，并且使得自适应算法引擎在低频带中的聚焦或窄带噪声能量的存在期间增加高频带中的噪声消除性能。 还描述和要求保护其他实施例。

公开(公告)号：US20140072135A1

公开(公告)日：2014-03-13

申请号：US13709919

申请日：2012-12-10

Applicant: APPLE INC.

Inventor： Vladan Bajic ,  Thomas M. Jensen

IPC: G10K11/00

CPC classification number: G10K11/002 ,  G10K11/178 ,  G10K11/17881 ,  G10K2210/1081 ,  G10K2210/30231 ,  G10K2210/3028 ,  G10K2210/511

Abstract: An active noise control (ANC) processor has an adaptive filter that uses a reference signal to produce an anti-noise signal, and an error signal to evaluate cancellation performance. An adaptive filter algorithm engine configures the filter coefficients of the adaptive filter, in accordance with pre-shaped versions of the error and reference signals. The pre-shaping filter has a high-pass transfer function and enables the adaptive algorithm engine to increase noise cancellation performance in a high frequency band during the presence of focused or narrow-band noise energy in a low frequency band. Other embodiments are also described and claimed.

Abstract translation: 主动噪声控制（ANC）处理器具有使用参考信号产生抗噪声信号的自适应滤波器和用于评估取消性能的误差信号。 自适应滤波器算法引擎根据预先形状的错误和参考信号来配置自适应滤波器的滤波器系数。 预成形滤波器具有高通传递函数，并且使得自适应算法引擎在低频带中的聚焦或窄带噪声能量的存在期间增加高频带中的噪声消除性能。 还描述和要求保护其他实施例。

公开(公告)号：US20130259250A1

公开(公告)日：2013-10-03

申请号：US13629279

申请日：2012-09-27

Applicant: APPLE INC.

Inventor： Guy C. Nicholson ,  Thomas M. Jensen

IPC: G10K11/16

CPC classification number: G10K11/1782 ,  G10K11/178 ,  G10K2210/1081 ,  G10K2210/3028

Abstract: A feed forward active noise cancellation (ANC) system for use in a portable audio device has an adaptive digital filter and a reference microphone. A non-adaptive pre-shaping digital filter has an input coupled to the reference microphone and is in series with, and in front of, the adaptive filter. The pre-shaping filter is minimum phase and presents at least 2 dB more gain over a low audio frequency band than over a high audio frequency band. This may help compensate for low frequency band difficulties, and may thereby extend ANC bandwidth at the low end without a worsening impact on the high end. Other embodiments are also described and claimed.

Abstract translation: 用于便携式音频设备的前馈有源噪声消除（ANC）系统具有自适应数字滤波器和参考麦克风。 非自适应预整形数字滤波器具有耦合到参考麦克风并与自适应滤波器串联并在其前面的输入。 预成形滤波器是最小相位，并且在低音频频带上比在高音频频带上具有至少2dB的增益。 这可能有助于补偿低频带的困难，从而可以在低端扩展ANC带宽，而不会对高端产生恶化的影响。 还描述和要求保护其他实施例。

公开(公告)号：US11304001B2

公开(公告)日：2022-04-12

申请号：US16872076

申请日：2020-05-11

Applicant: Apple Inc.

Inventor： Nikolas T. Vitt ,  Joyce E. Gorny ,  Thomas M. Jensen ,  Jeffrey N. Gleason ,  Tyrone T. Chen

IPC: H04R3/04 ,  G01P5/00

Abstract: A method for detecting wind using a microphone and a speaker of an electronic device. The method obtains a microphone signal produced by the microphone. The method obtains a speaker input signal produced by the speaker that is emulating a microphone capturing ambient sound in an environment through the speaker. The method determines a coherence between the microphone signal and the speaker input signal and determines whether the coherence is below a coherence intensity threshold. In response to determining that the coherence is below the coherence intensity threshold, the method determines a presence of wind in the environment.

公开(公告)号：US11250833B1

公开(公告)日：2022-02-15

申请号：US17023278

申请日：2020-09-16

Applicant: Apple Inc.

Inventor： Vladan Bajic ,  Hanchi Chen ,  Vasu Iyengar ,  Yang Lu ,  Navneet Gandhi ,  Thomas M. Jensen

IPC: G10K11/178 ,  H04R1/10

Abstract: A method performed by an audio system that includes a headset with a left headset housing and a right headset housing. The method includes driving a speaker of the left headset housing with an audio signal, determining whether audio howl is present within the left headset housing by comparing spectral content from a first error microphone signal produced by a first error microphone of the left headset housing and spectral content from a second error microphone signal produced by a second error microphone of the right headset housing, and, in response to determining that audio howl is present, filtering the audio signal to mitigate the audio howl.

公开(公告)号：US09807528B1

公开(公告)日：2017-10-31

申请号：US14860417

申请日：2015-09-21

Applicant: Apple Inc.

Inventor： Thomas M. Jensen ,  David T. Yeh

IPC: H04R29/00 ,  H04R9/06 ,  H04R9/02 ,  H04R3/00

CPC classification number: H04R29/003 ,  H04R3/007 ,  H04R9/022 ,  H04R9/06 ,  H04R2499/11

Abstract: Method to perform thermal monitoring of an electro-mechanical actuator included in a device starts by receiving an in-field calibration temperature from a temperature sensor included in the device. The device may also receive an in-field calibration resistance from a resistance calculator included in the device. A calculated thermal coefficient of resistivity of the electro-mechanical actuator is then computed using an equation that relates the calculated thermal coefficient of resistivity to the in-field calibration temperature. The calculated thermal coefficient of resistivity changes based on the in-field calibration temperature. The equation includes parameters that are stored in the device. A temperature estimate of the electro-mechanical actuator is them computed based on the calculated thermal coefficient of resistivity. Other embodiments are also described.

公开(公告)号：US20160094917A1

公开(公告)日：2016-03-31

申请号：US14679807

申请日：2015-04-06

Applicant: Apple Inc.

Inventor： Christopher Wilk ,  Alexander V. Salvatti ,  Thomas M. Jensen ,  Scott P. Porter ,  Ruchir M. Dave ,  Andrew P. Bright ,  Roderick B. Hogan

IPC: H04R9/02 ,  H04R7/16

CPC classification number: H04R3/007 ,  H04R9/06 ,  H04R2499/11

Abstract: A micro speaker having a capacitive sensor to sense a motion of a speaker diaphragm, is disclosed. More particularly, embodiments of the micro speaker include a conductive surface of a diaphragm facing conductive surfaces of several capacitive plate sections across a gap. The diaphragm may be configured to emit sound forward away from a magnet of the micro speaker, and the capacitive plate sections may be supported on the magnet behind the diaphragm. In an embodiment, the gap provides an available travel for the diaphragm, which may be only a few millimeters. A sensing circuit may sense capacitances of the conductive surfaces to limit displacement of the diaphragm to within the available travel.

Abstract translation: 公开了一种具有感应扬声器振动板的运动的电容传感器的微型扬声器。 更具体地，微型扬声器的实施例包括隔着间隙面对几个电容板部分的导电表面的隔膜的导电表面。 隔膜可以被配置为向远离微型扬声器的磁体发出声音，并且电容板部分可以被支撑在隔膜后面的磁体上。 在一个实施例中，间隙为隔膜提供可用的行程，其可以仅为几毫米。 感测电路可以感测导电表面的电容，以将隔膜的位移限制在可用行程内。