公开(公告)号：US20190325874A1

公开(公告)日：2019-10-24

申请号：US16458537

申请日：2019-07-01

Applicant: Bose Corporation

Inventor： Ricardo Carreras ,  Alaganandan Ganeshkumar

IPC: G10L15/22 ,  G10L21/0216 ,  G10L15/20 ,  G10L25/78 ,  H04M9/08

Abstract: An audio device with at least one microphone adapted to receive sound from a sound field and create an output, and a processing system that is responsive to the output of the microphone. The processing system is configured to use a signal processing algorithm to detect a wakeup word, and modify the signal processing algorithm that is used to detect the wakeup word if the sound field changes.

公开(公告)号：US10438605B1

公开(公告)日：2019-10-08

申请号：US15925102

申请日：2018-03-19

Applicant: BOSE CORPORATION

Inventor： Alaganandan Ganeshkumar

IPC: G10L21/0208 ,  H04R1/10

Abstract: A headphone, headphone system, and method is provided to enhance speech pick-up from a user of a headphone, by removing noise and echo components. A primary signal is derived from at least one microphone associated with the headphone. The primary signal is configured to include a component of speech from the user. A noise reference signal is representative of acoustic noise in the environment of the headphone. A playback signal is provided by an audio source to be rendered by an acoustic driver associated with the headphone, and an echo reference signal is representative of the playback signal. The systems and methods filter the primary signal to reduce noise and echo components, based on the noise reference signal and the echo reference signal, respectively, to provide a voice estimate signal.

公开(公告)号：US20190287546A1

公开(公告)日：2019-09-19

申请号：US15925102

申请日：2018-03-19

Applicant: BOSE CORPORATION

Inventor： Alaganandan Ganeshkumar

IPC: G10L21/0208 ,  H04R1/10

Abstract: A headphone, headphone system, and method is provided to enhance speech pick-up from a user of a headphone, by removing noise and echo components. A primary signal is derived from at least one microphone associated with the headphone. The primary signal is configured to include a component of speech from the user. A noise reference signal is representative of acoustic noise in the environment of the headphone. A playback signal is provided by an audio source to be rendered by an acoustic driver associated with the headphone, and an echo reference signal is representative of the playback signal. The systems and methods filter the primary signal to reduce noise and echo components, based on the noise reference signal and the echo reference signal, respectively, to provide a voice estimate signal.

公开(公告)号：US09344796B2

公开(公告)日：2016-05-17

申请号：US14494852

申请日：2014-09-24

Applicant: Bose Corporation

Inventor： Alaganandan Ganeshkumar ,  Dennis D. Klug

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

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。

公开(公告)号：US20150055787A1

公开(公告)日：2015-02-26

申请号：US13973472

申请日：2013-08-22

Applicant: Bose Corporation

Inventor： Alaganandan Ganeshkumar

IPC: G10K11/00

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。

公开(公告)号：US12149881B2

公开(公告)日：2024-11-19

申请号：US18218095

申请日：2023-07-04

Applicant: Bose Corporation

Inventor： Somasundaram Meiyappan ,  Nathan A. Blagrove ,  Pepin Torres ,  Alaganandan Ganeshkumar

IPC: H04R1/10 ,  G06F3/16 ,  G10L15/08 ,  G10L15/22 ,  H04R1/08

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.

公开(公告)号：US11664041B2

公开(公告)日：2023-05-30

申请号：US17467833

申请日：2021-09-07

Applicant: Bose Corporation

Inventor： Alaganandan Ganeshkumar

IPC: G10L21/0232 ,  H04R3/00 ,  G10L21/0216

CPC classification number: G10L21/0232 ,  H04R3/005 ,  G10L2021/02166 ,  H04R2410/07

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.

公开(公告)号：US20230010505A1

公开(公告)日：2023-01-12

申请号：US17369049

申请日：2021-07-07

Applicant: Bose Corporation

Inventor： Alaganandan Ganeshkumar

IPC: H04R1/10 ,  G10L25/81 ,  H04R1/40

Abstract: Various implementations include systems for processing microphone audio signals for a wearable audio device. In particular implementations, a method for processing signals includes: capturing an internal signal with an inner microphone configured to be acoustically coupled to an environment inside an ear canal of a user; extracting a low frequency audio signal from the internal signal; capturing an external signal with an external microphone configured to be acoustically coupled to an environment outside the ear canal of the user; extracting a high frequency audio signal from the external signal; and mixing the high frequency audio signal with the low frequency audio signal.

公开(公告)号：US11533555B1

公开(公告)日：2022-12-20

申请号：US17369049

申请日：2021-07-07

Applicant: Bose Corporation

Inventor： Alaganandan Ganeshkumar

IPC: G10L25/81 ,  H04R1/10 ,  H04R1/40

Abstract: Various implementations include systems for processing microphone audio signals for a wearable audio device. In particular implementations, a method for processing signals includes: capturing an internal signal with an inner microphone configured to be acoustically coupled to an environment inside an ear canal of a user; extracting a low frequency audio signal from the internal signal; capturing an external signal with an external microphone configured to be acoustically coupled to an environment outside the ear canal of the user; extracting a high frequency audio signal from the external signal; and mixing the high frequency audio signal with the low frequency audio signal.

公开(公告)号：US11330358B2

公开(公告)日：2022-05-10

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.