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    Spatial headphone transparency
    2.
    发明授权
    Spatial headphone transparency 有权

    公开(公告)号：US10034092B1

    公开(公告)日：2018-07-24

    申请号：US15273396

    申请日：2016-09-22

    Applicant: Apple Inc.

    Inventor： Ismael H. Nawfal ,  Joshua D. Atkins ,  Stephen J. Nimick ,  Guy C. Nicholson ,  Jason M. Harlow

    IPC: H04R5/00 ,  H04R5/04 ,  H04R5/027 ,  H04R5/033

    Abstract: Digital audio signal processing techniques used to provide an acoustic transparency function in a pair of headphones. A number of transparency filters can be computed at once, using optimization techniques or using a closed form solution, that are based on multiple re-seatings of the headphones and that are as a result robust for a population of wearers. In another embodiment, a transparency hearing filter of a headphone is computed by an adaptive system that takes into consideration the changing acoustic to electrical path between an earpiece speaker and an interior microphone of that headphone while worn by a user. Other embodiments are also described and claimed.

    ACTIVE NOISE CANCELLATION DECISIONS IN A PORTABLE AUDIO DEVICE
    3.
    发明申请
    ACTIVE NOISE CANCELLATION DECISIONS IN A PORTABLE AUDIO DEVICE 审中-公开
    主动噪声消除决定在便携式音频设备

    公开(公告)号：US20130252675A1

    公开(公告)日：2013-09-26

    申请号：US13895659

    申请日：2013-05-16

    Applicant: Apple Inc.

    Inventor： Guy C. Nicholson

    IPC: G10K11/175

    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，以控制设备外部的环境声学噪声，并且可以由设备的用户听到。 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引起的音频伪影的阈值水平。 还描述和要求保护其他实施例。

    Spatial headphone transparency
    4.
    发明授权
    Spatial headphone transparency 有权

    公开(公告)号：US11503409B1

    公开(公告)日：2022-11-15

    申请号：US17200337

    申请日：2021-03-12

    Applicant: Apple Inc.

    Inventor： Ismael H. Nawfal ,  Joshua D. Atkins ,  Stephen J. Nimick ,  Guy C. Nicholson ,  Jason M. Harlow

    IPC: H04R5/04 ,  H04R5/027 ,  H04R5/033 ,  H04R1/10

    Abstract: Digital audio signal processing techniques used to provide an acoustic transparency function in a pair of headphones. A number of transparency filters can be computed at once, using optimization techniques or using a closed form solution, that are based on multiple re-seatings of the headphones and that are as a result robust for a population of wearers. In another embodiment, a transparency hearing filter of a headphone is computed by an adaptive system that takes into consideration the changing acoustic to electrical path between an earpiece speaker and an interior microphone of that headphone while worn by a user. Other embodiments are also described and claimed.

    Spatial headphone transparency
    5.
    发明授权
    Spatial headphone transparency 有权

    公开(公告)号：US10951990B2

    公开(公告)日：2021-03-16

    申请号：US16029314

    申请日：2018-07-06

    Applicant: Apple Inc.

    Inventor： Ismael H. Nawfal ,  Joshua D. Atkins ,  Stephen J. Nimick ,  Guy C. Nicholson ,  Jason M. Harlow

    IPC: H04R5/04 ,  H04R5/027 ,  H04R5/033 ,  H04R1/10

    Abstract: Digital audio signal processing techniques used to provide an acoustic transparency function in a pair of headphones. A number of transparency filters can be computed at once, using optimization techniques or using a closed form solution, that are based on multiple re-seatings of the headphones and that are as a result robust for a population of wearers. In another embodiment, a transparency hearing filter of a headphone is computed by an adaptive system that takes into consideration the changing acoustic to electrical path between an earpiece speaker and an interior microphone of that headphone while worn by a user. Other embodiments are also described and claimed.

    PRE-SHAPING SERIES FILTER FOR ACTIVE NOISE CANCELLATION ADAPTIVE FILTER
    7.
    发明申请
    PRE-SHAPING SERIES FILTER FOR ACTIVE NOISE CANCELLATION ADAPTIVE FILTER 有权
    用于主动噪声消除自适应滤波器的预成型系列滤波器

    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。

    DECISIONS ON AMBIENT NOISE SUPPRESSION IN A MOBILE COMMUNICATIONS HANDSET DEVICE
    8.
    发明申请
    DECISIONS ON AMBIENT NOISE SUPPRESSION IN A MOBILE COMMUNICATIONS HANDSET DEVICE 有权
    移动通信手段中的环境噪声抑制的决定

    公开(公告)号：US20130065652A1

    公开(公告)日：2013-03-14

    申请号：US13673267

    申请日：2012-11-09

    Applicant: Apple Inc.

    Inventor： Guy C. Nicholson

    IPC: H04B1/40

    CPC classification number: H04R3/002 ,  H04M1/605

    Abstract: A method in a communications device includes the following operations. During a call, a process automatically detects that the device has moved from an at-the-ear position to an away-from-the-ear position. Based on the detection, a noise suppressor that operates upon an uplink signal for the call is signaled to change its noise suppression performance. Other embodiments are also described and claimed.

    Abstract translation: 通信设备中的方法包括以下操作。 在通话期间，过程自动检测到设备已经从耳朵位置移动到远离位置。 基于该检测，用信号通知用于呼叫的上行链路信号的噪声抑制器来改变其噪声抑制性能。 还描述和要求保护其他实施例。

    Spatial headphone transparency
    9.
    发明授权
    Spatial headphone transparency 有权

    公开(公告)号：US12200458B1

    公开(公告)日：2025-01-14

    申请号：US18487534

    申请日：2023-10-16

    Applicant: Apple Inc.

    Inventor： Ismael H. Nawfal ,  Joshua D. Atkins ,  Stephen J. Nimick ,  Guy C. Nicholson ,  Jason M. Harlow

    IPC: H04R5/04 ,  H04R1/10 ,  H04R5/027 ,  H04R5/033

    Abstract: Digital audio signal processing techniques used to provide an acoustic transparency function in a pair of headphones. A number of transparency filters can be computed at once, using optimization techniques or using a closed form solution, which are based on multiple re-seatings of the headphones and that are as a result robust for a population of wearers. In another embodiment, a transparency hearing filter of a headphone is computed by an adaptive system that takes into consideration the changing acoustic to electrical path between an earpiece speaker and an interior microphone of that headphone while worn by a user. Other embodiments are also described and claimed.

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