公开(公告)号：US09591403B2

公开(公告)日：2017-03-07

申请号：US14640826

申请日：2015-03-06

Applicant: Bose Corporation

Inventor： Alaganandan Ganeshkumar

IPC: H04R3/00 ,  G10K11/178

CPC classification number: H04R3/002 ,  G10K11/178 ,  G10K11/17833 ,  G10K11/17883 ,  G10K2210/1282 ,  G10K2210/3028 ,  G10K2210/3032 ,  G10K2210/3055 ,  G10K2210/503 ,  H04R2499/13

Abstract: A method for operating an active noise reduction system that is designed to reduce sinusoidal noise, 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 sinusoidal noise. The noise reduction signal is altered based on the detected distortion.

Abstract translation: 一种用于操作有源噪声降低系统的方法，其被设计为减少正弦噪声，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，并且其中主动降噪系统包括一个或 更多的自适应滤波器输出大致正弦的噪声降低信号，其用于驱动一个或多个换能器，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噪声降低信号的频率与正弦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：US20160225364A1

公开(公告)日：2016-08-04

申请号：US15098863

申请日：2016-04-14

Applicant: Bose Corporation

Inventor： Alaganandan Ganeshkumar ,  Dennis D. Klug

IPC: 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.

公开(公告)号：US09118987B2

公开(公告)日：2015-08-25

申请号：US13796644

申请日：2013-03-12

Applicant: Bose Corporation

Inventor： Davis Y. Pan ,  Alaganandan Ganeshkumar

IPC: H03B29/00 ,  G10K11/16 ,  H04R1/00 ,  G10K11/178 ,  H04R1/10

CPC classification number: H04R1/00 ,  G10K11/178 ,  G10K11/1783 ,  G10K11/17854 ,  G10K11/17883 ,  G10K2210/1282 ,  G10K2210/3032 ,  G10K2210/3033 ,  G10K2210/3056 ,  H04R1/1083

Abstract: A device and method that is configured to operate an active noise reduction system for a motor vehicle, where there is an active noise reduction system input signal that is related to the vehicle engine operation, and where the active noise reduction system comprises one or more adaptive filters that output noise reduction signals that are used to drive one or more transducers with their outputs directed to reduce engine noise. The engine harmonic noise level is estimated from the input signal that is related to the vehicle engine operation, and the output of the transducers is limited based on the estimate of the engine harmonic noise level.

Abstract translation: 一种被配置为操作用于机动车辆的有源降噪系统的装置和方法，其中存在与车辆发动机操作有关的主动降噪系统输入信号，并且其中主动降噪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降噪信号，其输出被引导以减少发动机噪声。 根据与车辆发动机运转相关的输入信号估计发动机谐波噪声电平，并且基于发动机谐波噪声电平的估计来限制换能器的输出。

公开(公告)号：US20150189433A1

公开(公告)日：2015-07-02

申请号：US14640826

申请日：2015-03-06

Applicant: BOSE CORPORATION

Inventor： Alaganandan Ganeshkumar

IPC: H04R3/00

CPC classification number: H04R3/002 ,  G10K11/178 ,  G10K11/17833 ,  G10K11/17883 ,  G10K2210/1282 ,  G10K2210/3028 ,  G10K2210/3032 ,  G10K2210/3055 ,  G10K2210/503 ,  H04R2499/13

Abstract: A method for operating an active noise reduction system that is designed to reduce sinusoidal noise, 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 sinusoidal noise. The noise reduction signal is altered based on the detected distortion.

Abstract translation: 一种用于操作有源噪声降低系统的方法，其被设计为减少正弦噪声，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，并且其中主动降噪系统包括一个或 更多的自适应滤波器输出大致正弦的噪声降低信号，其用于驱动一个或多个换能器，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噪声降低信号的频率与正弦噪声的频率之间的差异。 基于检测到的失真改变降噪信号。