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    Adaptive null forming and echo cancellation for selective audio pick-up
    2.
    发明授权
    Adaptive null forming and echo cancellation for selective audio pick-up 有权

    公开(公告)号：US11430421B2

    公开(公告)日：2022-08-30

    申请号：US16695536

    申请日：2019-11-26

    Applicant: Bose Corporation

    Inventor： Jeremy Kemmerer ,  Alaganandan Ganeshkumar

    IPC: H04R3/00 ,  G10K11/16 ,  G10L21/0208 ,  G10L15/22 ,  G10L21/0216

    Abstract: Audio pickup systems and methods are provided to enhance an audio signal by removing noise components related to an acoustic environment. The systems and methods receive a primary signal and one or more reference signals from various microphones. Adaptive filtering and combining minimizes an energy content of a resulting output signal, e.g., to form a substantially null output when the system is in a static acoustic environment. When the system is a playback sound source, one or more echo cancellers may contribute to removing content from the output signal. A change in the acoustic environment, such as a new sound source, causes content in the output signal until the adaptive filtering adapts to the new environment. In some examples, a desired content such as a wake-up word is detected and adaptation is stopped.

    WEARABLE AUDIO DEVICE WITH INNER MICROPHONE ADAPTIVE NOISE REDUCTION
    3.
    发明申请
    WEARABLE AUDIO DEVICE WITH INNER MICROPHONE ADAPTIVE NOISE REDUCTION 有权

    公开(公告)号：US20220232310A1

    公开(公告)日：2022-07-21

    申请号：US17714561

    申请日：2022-04-06

    Applicant: Bose Corporation

    Inventor： Alaganandan Ganeshkumar

    IPC: H04R1/10 ,  G10K11/178

    Abstract: Various implementations include systems for processing inner microphone audio signals. In particular implementations, a system includes an external microphone configured to be acoustically coupled to an environment outside an car canal of a user; an inner microphone configured to be acoustically coupled to an environment inside the ear canal of the user; and an adaptive noise cancelation system configured to process an internal signal captured by the inner microphone and generate a noise reduced internal signal, wherein the noise reduced internal signal is adaptively generated in response to an external signal captured by the external microphone.

    WEARABLE AUDIO DEVICE WITH INNER MICROPHONE ADAPTIVE NOISE REDUCTION
    5.
    发明申请
    WEARABLE AUDIO DEVICE WITH INNER MICROPHONE ADAPTIVE NOISE REDUCTION 有权

    公开(公告)号：US20220060812A1

    公开(公告)日：2022-02-24

    申请号：US16999353

    申请日：2020-08-21

    Applicant: Bose Corporation

    Inventor： Alaganandan Ganeshkumar

    IPC: H04R1/10 ,  G10K11/178

    Abstract: Various implementations include systems for processing inner microphone audio signals. In particular implementations, a system includes an external microphone configured to be acoustically coupled to an environment outside an ear canal of a user; an inner microphone configured to be acoustically coupled to an environment inside the ear canal of the user; and an adaptive noise cancelation system configured to process an internal signal captured by the inner microphone and generate a noise reduced internal signal, wherein the noise reduced internal signal is adaptively generated in response to an external signal captured by the external microphone.

    Audio signal processing for noise reduction
    7.
    发明授权
    Audio signal processing for noise reduction 有权

    公开(公告)号：US10424315B1

    公开(公告)日：2019-09-24

    申请号：US15925241

    申请日：2018-03-19

    Applicant: BOSE CORPORATION

    Inventor： Alaganandan Ganeshkumar

    IPC: H04R1/10 ,  G10L21/02 ,  G10L25/84 ,  G10L21/0232 ,  G10L21/0208 ,  G10L25/51 ,  H04R3/00 ,  H03G5/16 ,  H04R1/40 ,  G10L25/21 ,  H04R5/033 ,  G10L21/0216

    Abstract: Audio device systems and methods are provided to enhance speech pick-up from a user. The systems and methods include a plurality of left signals and right signals from microphones coupled to left and right earpieces. Various of the signals are combined to provide a primary signal having enhanced acoustic response in the direction of a selected location, such as the user's mouth. Additionally, the left signals are combined to provide a left reference signal having reduced acoustic response from the selected location, and the right signals are combined to provide a right reference signal also having reduced acoustic response from the selected location. Each of the left and right reference signals are filtered to provide left and right noise estimates, respectively, and the left and right noise estimates are subtracted from the primary signal.

    Active reduction of harmonic noise from multiple rotating devices
    9.
    发明授权
    Active reduction of harmonic noise from multiple rotating devices 有权
    主动降低多个旋转装置的谐波噪声

    公开(公告)号：US09191739B2

    公开(公告)日：2015-11-17

    申请号：US13849856

    申请日：2013-03-25

    Applicant: Bose Corporation

    Inventor： Alaganandan Ganeshkumar ,  Dennis D. Klug

    IPC: A61F11/06 ,  H04R3/00 ,  G10K11/178

    CPC classification number: H04R3/002 ,  G10K11/178 ,  G10K11/17854 ,  G10K11/17883 ,  G10K2210/1282 ,  G10K2210/3028 ,  G10K2210/3032 ,  G10K2210/3054

    Abstract: A system and method for reducing noise caused by two or more rotating devices by taking in input signals with frequencies that are related to the rotation rates of the rotating devices, and causing one or more loudspeakers to produce sounds that are at about the same frequencies as the noise and of substantially opposite phase. There is a noise canceller associated with each rotating device. Each noise canceller includes a harmonic frequency computer that computes a harmonic frequency and provides the harmonic frequency to a harmonic sine wave generator that generates an output sine wave. Each nose canceller also has an adaptive filter that uses a sine wave to create a noise reduction signal that is used to drive one or more transducers with their outputs directed to reduce noise caused by the rotating devices. There is an overlap detector that compares the harmonic frequencies and, based on their proximity, alters the operation of one or more adaptive filters.

    Abstract translation: 一种用于通过接收具有与旋转装置的旋转速率相关的频率的输入信号来减少由两个或更多个旋转装置引起的噪声的系统和方法，并且使一个或多个扬声器产生与大约相同频率的声音 噪声和基本相反的相位。 每个旋转装置都有一个噪音消除器。 每个噪声消除器包括一个谐波频率计算机，它计算谐波频率并将谐波频率提供给产生输出正弦波的谐波正弦波发生器。 每个鼻子消除器还具有自适应滤波器，其使用正弦波来产生噪声降低信号，该信号用于驱动一个或多个换能器，其输出被引导以减少由旋转装置引起的噪声。 存在重叠检测器，其比较谐波频率，并且基于它们的接近度改变一个或多个自适应滤波器的操作。

    Active Reduction of Harmonic Noise from Multiple Noise Sources
    10.
    发明申请
    Active Reduction of Harmonic Noise from Multiple Noise Sources 有权
    主动降低多个噪声源的谐波噪声

    公开(公告)号：US20150010163A1

    公开(公告)日：2015-01-08

    申请号：US14494852

    申请日：2014-09-24

    Applicant: Bose Corporation

    Inventor： Alaganandan Ganeshkumar ,  Dennis D. Klug

    IPC: H04R3/00

    CPC classification number: G10K11/178 ,  G10K2210/1282 ,  G10K2210/3028 ,  G10K2210/3032 ,  G10K2210/3054 ,  H04R3/002 ,  H04R2499/13

    Abstract: A system and method for reducing harmonic noise caused by two or more noise sources by causing one or more loudspeakers to produce sounds that are at about the same frequencies as the noise and of substantially opposite phase. There is a noise canceller associated with each noise source. Each noise canceller includes a harmonic sine wave generator that generates an output sine wave. Each noise canceller also has an adaptive filter that uses a sine wave to create a noise reduction signal that is used to drive one or more transducers with their outputs directed to reduce noise caused by the noise sources. There is an overlap detector that compares the harmonic frequencies and, based on their proximity, alters the operation of one or more adaptive filters.

    Abstract translation: 一种用于通过使一个或多个扬声器产生与噪声大致相同的频率和基本上相反的相位的声音来减少由两个或更多个噪声源引起的谐波噪声的系统和方法。 每个噪声源都有一个噪声消除器。 每个噪声消除器包括产生输出正弦波的谐波正弦波发生器。 每个噪声消除器还具有自适应滤波器，其使用正弦波来产生噪声降低信号，该信号用于驱动一个或多个换能器，其输出被引导以减少由噪声源引起的噪声。 存在重叠检测器，其比较谐波频率，并且基于它们的接近度改变一个或多个自适应滤波器的操作。

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