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1. 发明申请

US20180190258A1 ADAPTATIONS FOR ACTIVE NOISE CANCELLATION INSIDE A VEHICLE 审中-公开
公开(公告)号：US20180190258A1
公开(公告)日：2018-07-05
申请号：US15639892
申请日：2017-06-30
申请人： QUALCOMM Incorporated
发明人： Asif Iqbal Mohammad , Rishabh Tyagi , Erik Visser , Rogerio Guedes Alves
IPC分类号： G10K11/178 , G10L15/02 , G10L15/22
CPC分类号： G10K11/1786 , G10K11/178 , G10K11/17883 , G10K2210/1282 , G10K2210/3028 , G10K2210/3046 , G10K2210/3053 , G10L15/02 , G10L15/22 , G10L2015/223
摘要： Adaptations for in-vehicle adaptive noise-canceling (ANC) technology are described. An example in-vehicle audio system includes ANC circuitry coupled to one or more error microphones. The ANC circuitry being configured to process audio data received from the one or more error microphones to determine a distinction between the engine-external noise and the engine noise. The ANC circuitry is further configured to alter, based on the distinction determined between the engine-external noise and the engine noise, a convergence between two or more ANC filters to form altered-convergence ANC filtering coefficients.

2. 发明授权

US09269344B2 Engine harmonic cancellation system afterglow mitigation 有权
标题翻译：发动机谐波消除系统余辉缓解
公开(公告)号：US09269344B2
公开(公告)日：2016-02-23
申请号：US14016561
申请日：2013-09-03
申请人： Bose Corporation
发明人： Davis Y. Pan
IPC分类号： G10K11/16 , H03B29/00 , G10K11/178
CPC分类号： G10K11/178 , G10K11/17823 , G10K11/17833 , G10K11/17854 , G10K11/17883 , G10K2210/121 , G10K2210/1282 , G10K2210/3016 , G10K2210/3035 , G10K2210/3037 , G10K2210/3053
摘要： 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 speed, and where the active noise reduction system comprises one or more adaptive filters that use a filter coefficient to modify the amplitude and/or phase of a noise cancellation reference signal and output noise reduction signals that are used to drive one or more transducers with their outputs directed to reduce engine noise, where the value of the coefficient is related to an adaptive filter leakage factor. Changes in the engine speed, based on the input signal that is related to the vehicle engine operation, are monitored. In response to changes in the engine speed, the adaptive filter leakage factor is temporarily modified.
摘要翻译：一种被配置为操作用于机动车辆的主动降噪系统的装置和方法，其中存在与车辆发动机速度相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，其使用滤波器系数来修改噪声消除参考信号的幅度和/或相位，并且输出用于驱动一个或多个换能器的噪声降低信号，其输出被引导以减少发动机噪声，其中系数值为涉及自适应滤波器泄漏因子。监视与车辆发动机运转有关的输入信号的发动机转速变化。响应于发动机速度的变化，自适应滤波器泄漏因子被暂时修改。

3. 发明申请

US20100150369A1 FILTER APPARATUS FOR ACTIVELY REDUCING NOISE 有权
标题翻译：用于减少噪音的过滤设备
公开(公告)号：US20100150369A1
公开(公告)日：2010-06-17
申请号：US12095819
申请日：2006-12-04
申请人： Arthur Perry Berkhoff , Gerard Nijsse
发明人： Arthur Perry Berkhoff , Gerard Nijsse
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , G10K2210/3017 , G10K2210/3053 , G10L21/0208
摘要： A filter apparatus for reducing noise from a primary noise source, comprising a secondary source signal connector for generating secondary noise to reduce said primary noise and a sensor connector for connecting to a sensor for measuring said primary and secondary noise as an error signal. A first control filter is arranged to receive a reference signal and calculate a control signal for the secondary source signal. A second control filter is arranged to receive a delayed reference signal and calculate an auxiliary control signal; wherein an adaptation circuit is arranged to adapt said second control filter while receiving an error signal as a sum of the auxiliary control signal and an auxiliary noise signal. The auxiliary noise signal is constructed from a difference of the delayed filtered error signal and a delayed control signal. The first control filter is updated by a copy of said updated second control filter.
摘要翻译：一种用于降低来自主要噪声源的噪声的滤波器装置，包括用于产生次级噪声以减少所述主要噪声的次级信号连接器和用于连接到用于测量所述主要和次要噪声的传感器的传感器连接器作为误差信号。第一控制滤波器被布置成接收参考信号并且计算辅助源信号的控制信号。第二控制滤波器被布置成接收延迟的参考信号并计算辅助控制信号; 其中适配电路被布置成在接收到作为辅助控制信号和辅助噪声信号的和的误差信号时使所述第二控制滤波器适配。辅助噪声信号由延迟的滤波误差信号和延迟的控制信号的差构成。所述第一控制滤波器由所述更新的第二控制滤波器的副本更新。

4. 发明申请

US20090175461A1 ACTIVE NOISE CONTROLLER 审中-公开
标题翻译：主动噪声控制器
公开(公告)号：US20090175461A1
公开(公告)日：2009-07-09
申请号：US12297965
申请日：2007-06-05
申请人： Yoshio Nakamura , Toshiyuki Funayama , Tsukasa Matono
发明人： Yoshio Nakamura , Toshiyuki Funayama , Tsukasa Matono
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , G10K2210/3028 , G10K2210/3053
摘要： In an active noise reduction apparatus with an adaptive notch filter used, a triangle wave as a reference signal input into a first coefficient updater and a second coefficient updater reduces the number of execution times of product-sum operations in a reference signal generator to reduce the operation load.
摘要翻译：在使用自适应陷波滤波器的有源降噪装置中，作为输入到第一系数更新器和第二系数更新器的参考信号的三角波减少了参考信号发生器中乘积和运算的执行次数，以减少操作负载。

5. 发明申请

US20020118844A1 System for computationally efficient active control of tonal sound or vibration 有权
标题翻译：用于计算有效主动控制音调声或振动的系统
公开(公告)号：US20020118844A1
公开(公告)日：2002-08-29
申请号：US10083773
申请日：2002-02-27
发明人： William Arthur Welsh , Douglas G. MacMartin , Alan M. Finn
IPC分类号： H04B015/00
CPC分类号： G05B5/01 , G05B21/02 , G10K11/178 , G10K2210/121 , G10K2210/1281 , G10K2210/3012 , G10K2210/3032 , G10K2210/3051 , G10K2210/3053 , G10K2210/321
摘要： A noise or vibration control system reduces a sampling rate and reduces a control rate to improve computation efficiency. The present invention permits the use of a sample frequency (fs) that is less than twice the frequency of interest (fd). The sensed signals are filtered to extract a particular frequency range with a lower bound given by (2nnull1)*fs/2 and an upper bound given by (2nnull1)*fs/2, where n is an integer chosen so that the frequency of interest (fd) is within the extracted frequency range. The control commands are also calculated at a reduced rate, which is dependent upon the bandwidth of the tone, rather than the absolute frequency of the tone. Rather than updating the control signals directly on the sampled sensor data yk as it enters the computer, the control computations are done on the harmonic components ak and bk, or equivalently on the magnitude and phase.
摘要翻译：噪声或振动控制系统降低采样率并降低控制速率以提高计算效率。本发明允许使用小于感兴趣频率（fd）的两倍的采样频率（fs）。所感测的信号被滤波以提取具有由（2n-1）* fs / 2给出的下限和由（2n + 1）* fs / 2给出的上限的特定频率范围，其中n是选择的整数，使得感兴趣的频率（fd）在提取的频率范围内。控制命令也以降低的速率计算，这取决于音调的带宽，而不是音调的绝对频率。在采样传感器数据yk进入计算机时，不是直接更新控制信号，而是在谐波分量ak和bk上进行控制计算，或等效于幅度和相位。

6. 发明授权

US5692055A Active noise-suppressive control method and apparatus 失效
标题翻译：主动噪声抑制控制方法及装置
公开(公告)号：US5692055A
公开(公告)日：1997-11-25
申请号：US719027
申请日：1996-09-24
申请人： Hisashi Sano , Shuichi Adachi
发明人： Hisashi Sano , Shuichi Adachi
IPC分类号： G10K11/178 , A61F11/06 , H03B29/00
CPC分类号： G10K11/1782 , G10K2210/12 , G10K2210/12821 , G10K2210/30232 , G10K2210/3026 , G10K2210/3053
摘要： A reproduced sound is sent from a speaker as a sound source unit provided in a sound field. An error signal is produced by a microphone on the basis of a difference in sound between the reproduced sound from the speaker and noise coming from the outside of the sound field into the sound field. A digital filter has a fixed transfer function approximated to a transfer function of the sound field, to which a signal for driving the speaker is supplied. Variation of the transfer function of the sound field is detected by the digital filter. A difference signal between the error signal and an output signal from the digital filter is calculated by an adder. The difference signal determined by the adder is inputted into an IMC filter. A signal for compensating the variation of the transfer function of the sound field and variation of the noise is produced by the IMC filter. A variable parameter of the IMC filter is set so that an absolute value of a product of a value of an approximated and set amount of variation, a distance from the sound source unit to the error-detecting unit, and the variable parameter of the IMC filter is less than 1. Thus, the noise coming into the inside of the sound field is canceled by using an output sound of the speaker.
摘要翻译：再现的声音作为设置在声场中的声源单元从扬声器发送。基于来自扬声器的再现声音和从声场外部到声场的噪声之间的声音的差异，由麦克风产生误差信号。数字滤波器具有近似于声场的传递函数的固定传递函数，供给用于驱动扬声器的信号。数字滤波器检测声场传递函数的变化。通过加法器计算误差信号和数字滤波器的输出信号之间的差分信号。由加法器确定的差分信号被输入到IMC滤波器中。用于补偿声场的传递函数的变化和噪声的变化的信号由IMC滤波器产生。设置IMC滤波器的可变参数，使得近似和设定的变化量值，从声源单元到误差检测单元的距离以及IMC的可变参数的乘积的绝对值滤波器小于1.因此，通过使用扬声器的输出声音来消除进入声场内部的噪声。

7. 发明授权

US5638304A Method and apparatus for active damping of vibration 失效
标题翻译：振动主动阻尼的方法和装置
公开(公告)号：US5638304A
公开(公告)日：1997-06-10
申请号：US198053
申请日：1994-02-18
申请人： Guy Billoud
发明人： Guy Billoud
IPC分类号： F16F15/00 , G10K11/178 , G10K11/16
CPC分类号： F16F15/002 , G10K11/1786 , G10K2210/129 , G10K2210/3032 , G10K2210/3033 , G10K2210/3042 , G10K2210/3046 , G10K2210/3051 , G10K2210/3053 , G10K2210/511
摘要： For active damping of vibration at a location subjected to a primary vibration field, a vibratory wave is generated by adaptive filtering of a reference signal and interferes with the primary field at the location. The residual amplitude of vibration at the location is measured, and filtering is adapted automatically to cancel the residual amplitude as measured. The reference signal is divided into a plurality of individual reference signals that are sine-shaped each containing only one of the plurality of frequencies at which the primary field presents a significant energy, with each individual signal being subjected to a respective adaptive digital filter, and the vibratory wave is generated from the sum of the individual filtered signals. An apparatus for implementing the method comprises n processing paths or channels, each having an actuator driving a digital filter, fed with a sine-shaped signal at a frequency corresponding to a concentration of vibratory energy to be damped.
摘要翻译：对于受到主振动场的位置的振动的主动阻尼，通过参考信号的自适应滤波产生振动波，并干扰位置处的主场。测量位置处的振动剩余振幅，并自动进行滤波以消除所测量的残余振幅。参考信号被分成多个单独的参考信号，每个参考信号是正弦形的，每个参考信号仅包含多个频率中的一个，主场呈现显着的能量，每个单独信号经受相应的自适应数字滤波器，以及振动波由各个滤波信号的和产生。用于实现该方法的装置包括n个处理路径或通道，每个处理路径或通道具有驱动数字滤波器的致动器，以与要被阻尼的振动能量的浓度相对应的频率馈送正弦信号。

8. 发明授权

US5426704A Noise reducing apparatus 失效
标题翻译：降噪装置
公开(公告)号：US5426704A
公开(公告)日：1995-06-20
申请号：US94449
申请日：1993-07-21
申请人： Manpei Tamamura , Eiji Shibata , Hiroshi Iidaka , Manabu Nohara
发明人： Manpei Tamamura , Eiji Shibata , Hiroshi Iidaka , Manabu Nohara
IPC分类号： G10K11/178 , A61F11/06
CPC分类号： G10K11/1784 , G10K2210/121 , G10K2210/1282 , G10K2210/3031 , G10K2210/3032 , G10K2210/3045 , G10K2210/3053 , G10K2210/3214 , G10K2210/3217 , G10K2210/512
摘要： A noise reducing apparatus which is particularly effective to reduce periodic noise with the construction simplified very much is disclosed. The noise reducing apparatus comprises a microphone, an adaptive filter for generating a signal to reduce noise inputted to the microphone, transfer characteristic compensation means for generating a signal to compensate for a transfer characteristic when the signal generated from the adaptive filter comes the microphone, a synchronizing pulse generation circuit for generating a pulse signal synchronized with the period of the noise, a pulse interval detection circuit for detecting the interval between pulses of the pulse signal, tap number changeover means for changing over the number of taps of the adaptive filter to a number with which the delay amount of a tapped delay line of the adaptive filter is equal to the interval detected by the pulse interval detection circuit, and a loudspeaker for generating sounds in response to the signal from the adaptive filter. Also a noise reducing apparatus suitable for with an automobile.
摘要翻译：公开了一种噪声降低装置，其特别有效地减少周期性噪声，同时非常简化。降噪装置包括麦克风，用于产生信号以减少输入到麦克风的噪声的自适应滤波器，用于当从自适应滤波器产生的信号到达麦克风时产生信号以补偿传送特性的传输特性补偿装置，同步脉冲发生电路，用于产生与噪声周期同步的脉冲信号;脉冲间隔检测电路，用于检测脉冲信号的脉冲间隔;抽头数转换装置，用于将自适应滤波器的抽头数转换为自适应滤波器的抽头延迟线的延迟量等于由脉冲间隔检测电路检测的间隔的数字，以及响应于来自自适应滤波器的信号产生声音的扬声器。还有一种适用于汽车的降噪装置。

9. 发明授权

US5233540A Method and apparatus for actively reducing repetitive vibrations 失效
标题翻译：积极减少重复振动的方法和装置
公开(公告)号：US5233540A
公开(公告)日：1993-08-03
申请号：US575223
申请日：1990-08-30
申请人： Anders O. Andersson , Richard A. Russo
发明人： Anders O. Andersson , Richard A. Russo
IPC分类号： G10K11/178
CPC分类号： G10K11/1786 , G10K2210/121 , G10K2210/3011 , G10K2210/3012 , G10K2210/3019 , G10K2210/3025 , G10K2210/3044 , G10K2210/3046 , G10K2210/3053
摘要： A method and apparatus for reducing repetitive vibrations in a region or structure by applying a plurality of control vibrations via a plurality of actuators (13) located in the region or structure (11) and cyclically updating the control vibrations to improve the reduction of the repetitive vibrations are disclosed. The repetitive vibrations are sensed (14) at a plurality of locations in the region or structure and decomposed into a number of frequency components. Next, a first estimate of each control vibration, formed of the same frequency components, that together will reduce the sensed vibrations is made. Each first control vibration estimate is applied to the region or structure via an actuator (13). Thereafter, each control vibration is cyclically updated to improve the reduction of the sensed vibrations whether or not changes occur in the repetitive vibrations, the region or structure (11), or the apparatus used to carry out the method of the invention. Each update cycle is begun by decomposing the sensed vibrations (which are now formed by the control vibrations and the repetitive vibrations) into the same frequency components as before. The greatest-amplitude frequency components are selected for updating. Transfer function matrices modeling the system actuator-to-sensor response characteristics are used to calculate updates for the selected frequency components. The updates are used to modify the control vibrations.
摘要翻译：一种用于通过经由位于所述区域或结构（11）中的多个致动器（13）施加多个控制振动来减少区域或结构中的重复振动的方法和装置，并且周期性地更新所述控制振动以改善所述重复性公开了振动。在区域或结构中的多个位置处感测重复振动（14）并分解成多个频率分量。接下来，进行由相同频率分量形成的每个控制振动的第一估计，这些振动将一起减少感测到的振动。每个第一控制振动估计经由致动器（13）施加到区域或结构。此后，每个控制振动被循环地更新，以改善感测振动的减少，无论是否在重复振动，区域或结构（11）中发生变化，或者用于执行本发明的方法的设备。通过将感测的振动（其现在由控制振动和重复振动形成）分解成与以前相同的频率分量来开始每个更新周期。选择最大幅度频率分量进行更新。用于建模系统执行器到传感器响应特性的传递函数矩阵用于计算所选频率分量的更新。更新用于修改控制振动。

10. 发明申请

US20170053638A1 HYBRID ADAPTIVE NOISE CANCELLATION SYSTEM WITH FILTERED ERROR MICROPHONE SIGNAL 有权
标题翻译：混合自适应噪声消除系统与过滤错误麦克风信号
公开(公告)号：US20170053638A1
公开(公告)日：2017-02-23
申请号：US14832585
申请日：2015-08-21
申请人： Cirrus Logic International Semiconductor Ltd.
发明人： Dayong Zhou , Yang Lu , Ning Li , Nitin Kwatra , Antonio J. Miller
IPC分类号： G10K11/178
CPC分类号： G10K11/178 , G10K11/16 , G10K11/17817 , G10K11/17879 , G10K11/17885 , G10K2210/108 , G10K2210/1081 , G10K2210/1082 , G10K2210/3017 , G10K2210/3022 , G10K2210/3026 , G10K2210/3027 , G10K2210/3035 , G10K2210/3039 , G10K2210/3045 , G10K2210/3049 , G10K2210/3053 , G10K2210/3055 , G10K2210/3056 , G10K2210/509 , H04R1/1083 , H04R3/002 , H04R3/005 , H04R2410/05 , H04R2460/01 , H04R2499/11
摘要： In accordance with systems and methods of the present disclosure, an adaptive noise cancellation system may include an alignment filter configured to correct misalignment of a reference microphone signal and an error microphone signal by generating a misalignment correction signal.
摘要翻译：根据本公开的系统和方法，自适应噪声消除系统可以包括对准滤波器，其被配置为通过产生未对准校正信号来校正参考麦克风信号和误差麦克风信号的未对准。

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