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1. 发明授权

US11908444B2 Wave-domain approach for cancelling noise entering an aperture 有权
公开(公告)号：US11908444B2
公开(公告)日：2024-02-20
申请号：US17509336
申请日：2021-10-25
申请人： GN Hearing A/S
发明人： Willem Bastiaan Kleijn , Daan Ratering
IPC分类号： G10K11/178
CPC分类号： G10K11/1785 , G10K2210/3012
摘要： An apparatus for providing active noise control, includes: one or more microphones configured to detect sound entering through an aperture of a building structure; a set of speakers configured to provide sound output for cancelling or reducing at least some of the sound; and a processing unit communicatively coupled to the set of speakers, wherein the processing unit is configured to provide control signals to operate the speakers, wherein the control signals are independent of an error-microphone output.

2. 发明公开

US20240029701A1 NOISE REDUCTION SYSTEM HAVING A NONLINEARITY FILTER UNIT, METHOD OF OPERATING THE SYSTEM AND USE OF THE SYSTEM 审中-公开
公开(公告)号：US20240029701A1
公开(公告)日：2024-01-25
申请号：US18220968
申请日：2023-07-12
申请人： recalm GmbH
发明人： Marc VON ELLING
IPC分类号： G10K11/178
CPC分类号： G10K11/17815 , G10K11/17823 , G10K11/17825 , G10K11/17881 , G10K2210/1282 , G10K2210/3027 , G10K2210/3044 , G10K2210/30231 , G10K2210/3026 , G10K2210/3028 , G10K2210/3055 , G10K2210/3035 , G10K2210/3012 , G10K2210/3046
摘要： A noise reduction system for actively compensating background noise in a passenger transport area of a vehicle. The noise reduction system includes a nonlinearity filter unit having a model of a non-linear transfer function of the sound generator, wherein the nonlinearity filter unit is configured to receive the anti-noise signal and to generate a filtered anti-noise signal by applying a non-linear filter function on the anti-noise signal, which is based on the model of the non-linear transfer function in that the non-linear response of the sound generator is at least partially corrected when driven by the filtered anti-noise signal. Wherein the nonlinearity filter unit is further configured to output the filtered anti-noise signal to a sound generator.

3. 发明授权

US09959859B2 Active noise-control system with source-separated reference signal 有权
公开(公告)号：US09959859B2
公开(公告)日：2018-05-01
申请号：US14986527
申请日：2015-12-31
申请人： Harman International Industries, Inc.
发明人： Donald Joseph Butts
IPC分类号： G10K11/178 , G10L21/0216 , F01N1/06
CPC分类号： G10K11/178 , F01N1/065 , F01N2560/14 , G10K2210/3012 , G10K2210/3027 , G10K2210/3028 , G10L21/0216 , G10L21/0272
摘要： The various embodiments set forth an active noise cancellation system that includes a source separation algorithm. The source separation algorithm enables the identification of acoustic inputs from a particular sound source based on a reference signal generated with one or more microphones. Consequently, the identified acoustic inputs can be cancelled or damped in a targeted listening location via an acoustic correction signal, where the acoustic correction signal is generated based on a sound source separated from the reference signal. Advantageously, the reference signal can be generated with a microphone, even though such a reference signal may include a combination of multiple acoustic inputs. Thus, noise sources that cannot be individually measured, for example with an accelerometer mounted to a vibrating structure, can still be identified and actively cancelled.

4. 发明申请

US20170268395A1 WASTE AIR EXHAUSTING DEVICE HAVING FUNCTIONALITY TO ABATE NOISE AND MODULATE NOISE FREQUENCY 审中-公开
公开(公告)号：US20170268395A1
公开(公告)日：2017-09-21
申请号：US15230006
申请日：2016-08-05
申请人： Chung Yuan Christian University
发明人： Cheng-Yuan Chang , Sen-Maw Kuo
IPC分类号： F01N1/06 , G10K11/178
CPC分类号： F01N1/065 , G10K11/178 , G10K11/1781 , G10K11/17853 , G10K11/17881 , G10K2210/12822 , G10K2210/3012 , G10K2210/3026 , G10K2210/3027 , G10K2210/3028 , G10K2210/3055
摘要： Differing from conventionally-used exhaust pipe utilizing discontinuous section area(s) and sound-absorbing material(s) to abate the noise produced by an engine, the present invention provides a waste air exhausting device consisting of: a housing, a supporting plate disposed in the housing, a miniature microphone disposed at the end of the housing, and a loudspeaker disposed on the supporting plate. Therefore, according to the noise produced by the engine, a noise controller system coupling to the miniature microphone and the loudspeaker is able to produce an anti-noise signal through the loudspeaker for abating the engine noise. On the other hand, the noise controller system can also produce an anti-noise signal having specific frequencies components according to the frequency of the engine noise and a reference signal, so as to modulate the frequency of the engine noise by broadcasting the anti-noise signal having the specific frequencies components in the housing through the loudspeaker.

5. 发明申请

US20130301846A1 FREQUENCY AND DIRECTION-DEPENDENT AMBIENT SOUND HANDLING IN PERSONAL AUDIO DEVICES HAVING ADAPTIVE NOISE CANCELLATION (ANC) 有权
标题翻译：具有自适应噪声消除的个人音频设备中的频率和方向依赖性声音处理（ANC）
公开(公告)号：US20130301846A1
公开(公告)日：2013-11-14
申请号：US13784018
申请日：2013-03-04
申请人： CIRRUS LOGIC, INC.
发明人： Jeffrey Alderson , Jon D. Hendrix , Dayong Zhou
IPC分类号： H04R3/00
CPC分类号： H04R3/002 , G10K11/178 , G10K2210/108 , G10K2210/3012 , G10K2210/30231 , G10K2210/3025 , G10K2210/3028 , G10K2210/30391 , G10K2210/3226 , G10K2210/503 , H04R1/1083 , H04R3/00
摘要： A personal audio device, such as a wireless telephone, includes noise canceling circuit that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone may also be provided proximate the speaker to measure the output of the transducer in order to control the adaptation of the anti-noise signal and to estimate an electro-acoustical path from the noise canceling circuit through the transducer. A processing circuit that performs the adaptive noise canceling (ANC) function also detects frequency-dependent characteristics in and/or direction of the ambient sounds and alters adaptation of the noise canceling circuit in response to the detection.
摘要翻译：诸如无线电话的个人音频设备包括噪声消除电路，其自适应地从参考麦克风信号产生抗噪声信号，并将抗噪声信号注入到扬声器或其它换能器输出中以引起环境音频声音的消除。还可以在扬声器附近提供误差麦克风以测量换能器的输出，以便控制抗噪声信号的适应性并且估计通过换能器的噪声消除电路的电声路径。执行自适应噪声消除（ANC）功能的处理电路还检测环境声音和/或方向上的频率相关特性，并且响应于检测改变噪声消除电路的适应。

6. 发明申请

US20110303784A1 System and Method for Vibration Control in a Rotorcraft Using an Adaptive Reference Model Algorithm 有权
标题翻译：使用自适应参考模型算法在旋翼飞机中进行振动控制的系统和方法
公开(公告)号：US20110303784A1
公开(公告)日：2011-12-15
申请号：US13202731
申请日：2010-03-01
申请人： David E. Heverly, II , Rupinder Singh , John Pappas
发明人： David E. Heverly, II , Rupinder Singh , John Pappas
IPC分类号： B64C27/54
CPC分类号： B64C27/001 , B64C2027/004 , F16F15/002 , G10K11/17854 , G10K11/17879 , G10K11/17883 , G10K2210/1281 , G10K2210/3012 , G10K2210/3055 , G10K2210/3056
摘要： The adaptive reference model algorithm uses a gain scheduling feature combined with a customized Least-Squares routine as an adaptive method for adjusting feedback control so as to account for variations in Transfer Function (G), thereby optimizing the effectiveness of the Active Vibration Control (AVC) System. The Least-Squares routine identifies the transfer function in a background process without interruption of closed loop vibration control. This identification approach is accomplished without intentional interrogation of the AVC actuators and without intentional vibration level changes. For this adaptive control logic, the dynamic relationship between AVC actuators and AVC sensors is represented by a mathematical model of Transfer Function (G). The mathematical model of Transfer Function (G) is continuously updated by the Least-Squares routine. A feedback gain (H) is computed from the mathematical model of Transfer Function (G), and the feedback gain (H) is updated each time the mathematical model of Transfer Function (G) is updated.
摘要翻译：自适应参考模型算法使用增益调度特征结合定制的最小二乘例程作为调整反馈控制的自适应方法，以便考虑传递函数（G）的变化，从而优化主动振动控制（AVC）的有效性）系统。最小二乘法例程在后台程序中识别传递函数，而不会中断闭环振动控制。该识别方法是在没有有意询问AVC致动器而没有有意的振动水平变化的情况下完成的。对于这种自适应控制逻辑，AVC执行器和AVC传感器之间的动态关系由传递函数（G）的数学模型表示。传递函数（G）的数学模型通过最小二乘例程不断更新。从传递函数（G）的数学模型计算反馈增益（H），并且每当更新传递函数（G）的数学模型时，反馈增益（H）被更新。

7. 发明授权

US07343016B2 Linear independence method for noninvasive on-line system identification/secondary path modeling for filtered-X LMS-based active noise control systems 失效
标题翻译：用于基于过滤X LMS的主动噪声控制系统的非侵入性在线系统识别/二次路径建模的线性独立方法
公开(公告)号：US07343016B2
公开(公告)日：2008-03-11
申请号：US10619801
申请日：2003-07-16
申请人： Benjamin Jung Kim
发明人： Benjamin Jung Kim
IPC分类号： A61F11/06
CPC分类号： G10K11/178 , G10K2210/3012 , G10K2210/3022 , G10K2210/30232 , G10K2210/30351 , G10K2210/3055 , G10K2210/511
摘要： A method for noninvasive on-line secondary path modeling for the filtered-X LMS algorithm actively controls periodic noise. The method, based in the frequency domain, uses the concept of linear independence of two equations/two unknowns to arrive at the secondary path estimate. Linear independence of the two equations is achieved by adjusting the control filter output via the filter coefficients prior to the acquisition of the second set of data corresponding to the second equation.
摘要翻译：用于过滤X LMS算法的无创在线二次路径建模的方法主动地控制周期性噪声。该方法基于频域，使用两个方程/两个未知数的线性独立性的概念来得出次级路径估计。通过在获取对应于第二方程的第二组数据之前通过滤波器系数调整控制滤波器输出来实现两个方程的线性独立性。

8. 发明申请

US20040037430A1 Linear independence method for noninvasive on-line system identification/secondary path modeling for filtered-X LMS-based active noise control systems 失效
标题翻译：用于基于过滤X LMS的主动噪声控制系统的非侵入性在线系统识别/二次路径建模的线性独立方法
公开(公告)号：US20040037430A1
公开(公告)日：2004-02-26
申请号：US10619801
申请日：2003-07-16
申请人： THE PENN STATE RESEARCH FOUNDATION
发明人： Benjamin Jung Kim
IPC分类号： A61F011/06 , G10K011/16 , H03B029/00
CPC分类号： G10K11/178 , G10K2210/3012 , G10K2210/3022 , G10K2210/30232 , G10K2210/30351 , G10K2210/3055 , G10K2210/511
摘要： A method for noninvasive on-line secondary path modeling for the filtered-X LMS algorithm actively controls periodic noise. The method, based in the frequency domain, uses the concept of linear independence of two equations/two unknowns to arrive at the secondary path estimate. Linear independence of the two equations is achieved by adjusting the control filter output via the filter coefficients prior to the acquisition of the second set of data corresponding to the second equation.
摘要翻译：用于过滤X LMS算法的无创在线二次路径建模的方法主动地控制周期性噪声。该方法基于频域，使用两个方程/两个未知数的线性独立性的概念来得出次级路径估计。通过在获取对应于第二方程的第二组数据之前通过滤波器系数调整控制滤波器输出来实现两个方程的线性独立性。

9. 发明授权

US06216047B1 Adaptive control method for cyclic signal 有权
标题翻译：循环信号的自适应控制方法
公开(公告)号：US06216047B1
公开(公告)日：2001-04-10
申请号：US09174544
申请日：1998-10-19
申请人： Katsuhiro Goto
发明人： Katsuhiro Goto
IPC分类号： G05B1302
CPC分类号： G10K11/178 , G05B13/042 , G10K2210/3012 , G10K2210/3054 , G10K2210/503
摘要： An adaptive control method employs an adaptive signal generation algorithm 11 for generating an adaptive signal y(n) which cancels a cyclic signal y(n) at a measurement point 24, and an adaptive coefficient vector renewing algorithm 12 for renewing the amplitudes a(n) and phases &phgr;(n) of the adaptive signal y(n). The adaptive coefficient vector renewing algorithm 12 is quasi-normalized by a sum [A(&ohgr;)+&ggr;]. The A(&ohgr;) is a gain measurement of a transfer characteristic 23, and the &ggr; is a divergence prevention constant. Hence, in a frequency region where the gain A(&ohgr;) is high, a step size is small so that the stability of the adaptive control method can be enhanced. In a frequency region where the gain A(&ohgr;) is low, the step size is large so that the adaptability can be improved. As a result, the convergence stability and the characteristic following the frequency variation are compatible with each other.
摘要翻译：自适应控制方法采用自适应信号生成算法11，用于生成在测量点24消除循环信号y（n）的自适应信号y（n），以及用于更新幅度a（n）的自适应系数向量更新算法12 ）和自适应信号y（n）的相位phi（n）。自适应系数向量更新算法12通过和[A（ω）+γ]进行准归一化。 A（ω）是传递特性23的增益测量，γ是发散预防常数。因此，在增益A（ω）高的频率区域中，步长小，能够提高自适应控制方法的稳定性。在增益A（ω）低的频率区域中，台阶大，能够提高适应性。结果，收敛稳定性和频率变化之后的特性彼此兼容。

10. 发明授权

US5621803A Active attenuation system with on-line modeling of feedback path 失效
标题翻译：反馈路径在线建模的主动衰减系统
公开(公告)号：US5621803A
公开(公告)日：1997-04-15
申请号：US591126
申请日：1996-01-25
申请人： Trevor A. Laak
发明人： Trevor A. Laak
IPC分类号： G10K11/178 , A61F2/20 , H03B29/00
CPC分类号： G10K11/1784 , G10K2210/112 , G10K2210/3012 , G10K2210/3017 , G10K2210/30232 , G10K2210/3027 , G10K2210/3049 , G10K2210/3053
摘要： In an active adaptive attenuation system having a main model, a second adaptive filter model is provided having an input from the output of the main model, and an output supplied to the input of the main model. A copy of the main model has an input from the input to the second model and an output supplied to a multiplier multiplying the error signal and the output of the copy and supplying the resultant product as a weight update signal to the second model.
摘要翻译：在具有主模型的主动自适应衰减系统中，提供具有来自主模型的输出的输入和提供给主模型的输入的输出的第二自适应滤波器模型。主模型的副本具有从输入到第二模型的输入，以及提供给乘法器的输出，乘法器将误差信号和复制的输出相乘，并将得到的乘积作为加权更新信号提供给第二模型。

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