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21.发明授权Instability detection and correction in sinusoidal active noise reduction system 有权正弦有源降噪系统中的不稳定性检测和校正公开(公告)号：US09177541B2
公开(公告)日：2015-11-03
申请号：US13973472
申请日：2013-08-22
Applicant: Bose Corporation
Inventor： Alaganandan Ganeshkumar
IPC: G10K11/00 , G10K11/178
CPC classification number: G10K11/002 , G10K11/178 , G10K2210/1282 , G10K2210/3028 , G10K2210/3032 , G10K2210/3055 , G10K2210/503
Abstract: A method for operating an active noise reduction system that is designed to reduce the harmonic or sinusoidal noise emanating from a rotating device, where there is an active noise reduction system input signal that is related to the frequency of the noise to be reduced, and where the active noise reduction system comprises one or more adaptive filters that output a generally sinusoidal noise reduction signal that is used to drive one or more transducers with their outputs directed to reduce the noise. Distortions of the noise reduction signal are detected. A distortion is based at least in part on differences between the frequency of the noise reduction signal and the frequency of the harmonic noise. The noise reduction signal is altered based on the detected distortion.
Abstract translation: 一种用于操作有源降噪系统的方法，其被设计为减少从旋转装置发出的谐波或正弦噪声，其中存在与待降低的噪声的频率有关的主动降噪系统输入信号，以及其中 有源噪声降低系统包括一个或多个自适应滤波器，其输出用于驱动一个或多个换能器的大致正弦降噪信号，其输出被引导以减少噪声。 检测出降噪信号的失真。 失真至少部分地基于降噪信号的频率和谐波噪声的频率之间的差异。 基于检测到的失真改变降噪信号。
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公开(公告)号：US20230353928A1
公开(公告)日：2023-11-02
申请号：US18218095
申请日：2023-07-04
Applicant: Bose Corporation
Inventor： Somasundaram Meiyappan , Nathan A. Blagrove , Pepin Torres , Alaganandan Ganeshkumar
CPC classification number: H04R1/1083 , G06F3/167 , G10L15/22 , H04R1/08 , G10K2210/3023 , G10L2015/088
Abstract: A method performed by a wearable audio output device worn by a user is provided for controlling external noise attenuated by wearable audio output device. A speech is detected from a user wearing the wearable audio output device, wherein the audio output device has active noise reduction turned on. It is determined, based on the detecting, that the user desires to speak to a subject in the vicinity of the user. In response to the determining, a level of noise reduction is reduced to enable the user to hear sounds external to the audio output device. It is determined that the user desires to speak to the subject by detecting at least one condition of a plurality of conditions.
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公开(公告)号：US20220201416A1
公开(公告)日：2022-06-23
申请号：US17126630
申请日：2020-12-18
Applicant: Bose Corporation
Inventor： Douglas Warren Young , Nathan A. Blagrove , Rasmus Abildgren , Casper Stork Bonde , Alaganandan Ganeshkumar
Abstract: A system and method for selecting audio capture sensors of wearable devices in obtaining voice data. The method provides obtaining signals associated with the user's voice at first and second wearable devices, comparing energy levels of the first and second signals, and selecting one or more audio capture sensors based on the energy levels of each signal. Due to the symmetry of the acoustic energy produced by the user's voice to a first and second wearable device, any difference in energy level between the total energy obtained by the first wearable device and the total energy obtained by the second wearable device can be attributed solely to ambient noise. Thus, the device with the higher total energy has a lower signal-to-noise ratio and selection of an audio capture sensor of the other wearable device with a higher signal-to-noise ratio is provided to obtain voice data moving forward.
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公开(公告)号：US11145319B2
公开(公告)日：2021-10-12
申请号：US16778541
申请日：2020-01-31
Applicant: Bose Corporation
Inventor： Alaganandan Ganeshkumar
IPC: G10L21/0232 , H04R3/00 , G10L21/0216
Abstract: A personal audio device configured to be worn on the head or body of a user and including a plurality of microphones configured to provide a plurality of separate microphone signals capturing audio from an environment external to the personal audio device, and a processor configured to process a first subset of the plurality of separate microphone signals using a first array processing technique to provide a first array signal, compare the first array signal to a microphone signal from the plurality of separate microphone signals, and select the first array signal or the microphone signal based on the comparison.
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公开(公告)号：US10681453B1
公开(公告)日：2020-06-09
申请号：US16439311
申请日：2019-06-12
Applicant: BOSE CORPORATION
Inventor： Somasundaram Meiyappan , Nathan Blagrove , Pepin Torres , Alaganandan Ganeshkumar
Abstract: A method performed by a wearable audio output device worn by a user is provided for controlling external noise attenuated by wearable audio output device. A speech is detected from a user wearing the wearable audio output device, wherein the audio output device has active noise reduction turned on. It is determined, based on the detecting, that the user desires to speak to a subject in the vicinity of the user. In response to the determining, a level of noise reduction is reduced to enable the user to hear sounds external to the audio output device. It is determined that the user desires to speak to the subject by detecting at least one condition of a plurality of conditions.
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Patent Agency Ranking
公开(公告)号：US20200098346A1
公开(公告)日：2020-03-26
申请号：US16695536
申请日：2019-11-26
Applicant: Bose Corporation
Inventor： Jeremy Kemmerer , Alaganandan Ganeshkumar
IPC: G10K11/16 , G10L21/0208 , H04R3/00
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.
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公开(公告)号：US20190304427A1
公开(公告)日：2019-10-03
申请号：US16445908
申请日：2019-06-19
Applicant: Bose Corporation
Inventor： Jeremy Kemmerer , Alaganandan Ganeshkumar
IPC: G10K11/16 , H04R3/00 , G10L21/0208
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 a reference signal. The reference signal is adaptively filtered and subtracted from the primary signal to minimize an energy content of a resulting output signal.
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公开(公告)号：US10311889B2
公开(公告)日：2019-06-04
申请号：US15463368
申请日：2017-03-20
Applicant: BOSE CORPORATION
Inventor： Alaganandan Ganeshkumar , Xiang-Ern Yeo , Mehmet Ergezer
IPC: H04R1/10 , G10L21/02 , G10L21/0232 , H04R1/40 , G10L21/0216 , H04R5/033 , G10L21/0208 , G10K11/178 , H04R1/32 , H04R3/00
Abstract: A headphone, headphone system, and speech enhancing method is provided to enhance speech pick-up from the user of a headphone and includes receiving a plurality of signals from a set of microphones and generating a primary signal by array processing the microphone signals to steer a beam toward the user's mouth. A noise reference signal is also derived from one or more microphones, and a voice estimate signal is generated by filtering the primary signal to remove components that are correlated to the noise reference signal.
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公开(公告)号：US10290309B2
公开(公告)日：2019-05-14
申请号：US15941331
申请日：2018-03-30
Applicant: Bose Corporation
Inventor： Alaganandan Ganeshkumar
IPC: G10L19/16 , G10L19/10 , H03G7/00 , H03G9/00 , G10L19/26 , G10L21/034 , H03M7/38 , H04R5/033 , H04R25/00
Abstract: The technology described in this document can be embodied in a computer-implemented method that includes receiving, at a first acoustic device, a representation of an audio signal, and amplifying the representation of the audio signal by a first gain factor to generate an amplified input signal. The method also includes processing the amplified input signal by an audio codec that includes one or more processors to generate a processed signal that represents a portion of the audio signal to be output by a second acoustic device. The processed signal includes noise originating at the audio codec. The method further includes transmitting the processed signal to the second acoustic device.
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公开(公告)号：US20180226083A1
公开(公告)日：2018-08-09
申请号：US15941331
申请日：2018-03-30
Applicant: Bose Corporation
Inventor： Alaganandan Ganeshkumar
CPC classification number: G10L19/167 , G10L19/10 , G10L19/26 , G10L21/034 , H03G7/007 , H03G9/005 , H03M7/3046 , H04R5/033 , H04R25/554 , H04R2420/07
Abstract: The technology described in this document can be embodied in a computer-implemented method that includes receiving, at a first acoustic device, a representation of an audio signal, and amplifying the representation of the audio signal by a first gain factor to generate an amplified input signal. The method also includes processing the amplified input signal by an audio codec that includes one or more processors to generate a processed signal that represents a portion of the audio signal to be output by a second acoustic device. The processed signal includes noise originating at the audio codec. The method further includes transmitting the processed signal to the second acoustic device.
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