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1. 发明公开

EP2629289A1 Feedback active noise control system with a long secondary path 有权
标题翻译：系统用于与反馈有源噪声控制和一个长的第二路径
公开(公告)号：EP2629289A1
公开(公告)日：2013-08-21
申请号：EP12155561.9
申请日：2012-02-15
申请人： Harman Becker Automotive Systems GmbH
发明人： Christoph, Markus
IPC分类号： G10K11/178
CPC分类号： G10K11/178 , G10K2210/108 , G10K2210/1282 , G10K2210/3011 , G10K2210/3026
摘要： A feedback ANC system is disclosed that comprises a microphone (1) and a loudspeaker (2) arranged in a distance from each other; the microphone being acoustically coupled to the loudspeaker via a secondary path (3) and the loudspeaker being electrically coupled to the microphone via an ANC filter (6). The distance between the microphone and the loudspeaker is larger than a value that is determined by the speed of sound divided by 20 times an upper critical frequency of the ANC system.
摘要翻译：反馈ANC系统被游离缺失盘确实包括麦克风（1）和扬声器（2）布置在彼此的距离; 麦克风被经由次级路径（3）和扬声器声学耦合到所述扬声器经由过滤器被电耦合到所述麦克风到ANC（6）。麦克风和扬声器之间的距离大于一个值确实是确定性通过声音的20倍除以ANC系统的上临界频率的速度开采大。

2. 发明授权

EP0655151B1 MULTIPLE INTERACTING DVE ALGORITHM 失效
标题翻译：数字虚拟地球算法实现多重相互作用
公开(公告)号：EP0655151B1
公开(公告)日：2000-03-22
申请号：EP92920567.2
申请日：1992-09-15
申请人： NOISE CANCELLATION TECHNOLOGIES, INC.
发明人： ZIEGLER, Eldon, Jr.
IPC分类号： G06F17/00 , H03H21/00
CPC分类号： H03H21/0012 , G10K11/178 , G10K2210/3011 , G10K2210/3019 , G10K2210/30232 , G10K2210/3042 , G10K2210/3046
摘要： A digital virtual earth (DVE) cancellation system which receives a phenomena input signal via multiple sensors (1, 2, 3) representing residual phenomena to be canceled, and has adaptive filters (12, 24, 25) for each of the multiple sensor/actuator pairs, (1, 4, 2, 5, 3, 6) which generate the appropriate cancellation signal (19, 20, 21) for the associated actuator (4, 5, 6). The multiple interacting DVE (MIDVE) algorithm estimates the noise at each sensor (1, 2, 3) by subtracting out the combined effects of each actuator signal (19, 20, 21) from the residual signal (16, 17, 18) at that sensor (1, 2, 3). This estimated noise signal is used to control the adaptive filters (12, 24, 25) associated with the subject actuator (4, 5, 6). These filters (12, 24, 25) receive the estimated noise as input. They then produce the cancellation signals by filtering the estimated noise with the filter weights. These weights are adapted using the residual signal (16, 17, 18) and the estimated noise convolved with the system impulse responses.

3. 发明公开

EP0789900A1 REDUCTION OF COMPUTATIONAL BURDEN OF ADAPTIVELY UPDATING CONTROL FILTER(S) IN ACTIVE SYSTEMS 失效
标题翻译：计算看最后更新自适应控制有源滤波系统还原
公开(公告)号：EP0789900A1
公开(公告)日：1997-08-20
申请号：EP95939543.0
申请日：1995-10-19
申请人： LORD CORPORATION
发明人： SOUTHWARD, Steve, C. , MILLER, Lane, R.
IPC分类号： G10K11 , H03H21
CPC分类号： H03H21/0012 , G10K11/178 , G10K2210/3011 , G10K2210/3017 , G10K2210/3026 , G10K2210/3027 , G10K2210/3031 , G10K2210/3032 , G10K2210/3042 , G10K2210/3049 , G10K2210/3053 , G10K2210/3054
摘要： An active control method and apparatus for controlling vibration or sound wherein the computational burden to adaptively update the control filter within the update model is reduced. The apparatus includes means for producing an input signal for input to the update model and the reduction block, means for generating an error sensor, and an output device for canceling sound and/or vibration at a selected location. The method uses a gradient descent algorithm such as the filtered-x LMS algorithm and replaces the long filter model with a shortened length filter model. Error signal information together with the output information from the shortened length filter model are used to update the coefficients of the control filter according to an update calculation method. The shortened filter model only contains frequency response information at the L frequencies of interest. Because of the reduced amount of information contained in the shortened filter model, more updates per unit of time can be performed on the control filter(s) or a smaller or fewer processors or CPU's may be utilized. The method has applicability to feed-forward and feed-back type systems and also to systems using a waveform generator for supplying the input signal. The reduction method may be implemented on-line or off-line.

4. 发明公开

EP0612057A3 Active noise control systems 失效
标题翻译：主动噪声控制系统
公开(公告)号：EP0612057A3
公开(公告)日：1995-10-11
申请号：EP94301137.9
申请日：1994-02-17
申请人： FUJITSU LIMITED
发明人： Ohashi, Tadashi, c/o Fujitsu Limited , Hoshino, Tsutomu, c/o Fujitsu Limited , Yamaguchi, Atsushi, c/o Fujitsu Limited
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , F24F2013/247 , G10K2210/109 , G10K2210/112 , G10K2210/3011 , G10K2210/30232 , G10K2210/3041 , G10K2210/3052 , G10K2210/3053
摘要： An active noise elimination apparatus for eliminating noise generated from a blower (7) by generating from a sound generation unit (2) a sound which offsets the noise, in a cooling system for cooling a heat source by air blown from the blower (7) and exhausted to an exhaust port of the system through a duct (8), comprising a first sound reception unit (1) for receiving the noise generated from the blower (7); a first simulation unit (5) for outputting a sound to the sound generation unit (2) simulating the noise generated from the blower (7) and transmitted to the exhaust port through the duct (8); a second simulation unit (6) for receiving as input a noise simulating signal of the first simulation unit (5) so as to simulate a detouring sound generated from the sound generation unit (2) and transmitted to the first sound reception unit (1) through the duct (8); and a subtraction unit (4) for subtracting the detouring sound simulating signal of the second simulation unit (6) from the noise signal received by the first sound reception unit (1) and outputting the result to the first simulation unit (5).

5. 发明公开

EP0542457A2 Multi-channel active attenuation system with error signal inputs 失效
标题翻译： Vielkanal-aktive Dampfungsanordnung mit Eingabe von Fehlersignalen。
公开(公告)号：EP0542457A2
公开(公告)日：1993-05-19
申请号：EP92309995.6
申请日：1992-10-30
申请人： NELSON INDUSTRIES, INC.
发明人： Popovich, Steven R.
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , G10K2210/103 , G10K2210/3011 , G10K2210/3019 , G10K2210/3046 , G10K2210/3049 , G10K2210/3214
摘要： A multi-channel active acoustic attenuation system for attenuating a correlated input acoustic wave (6) has one or more output transducers (14,210) introducing one or more respective canceling acoustic waves to attenuate the input acoustic wave (6) and yield an attenuated output acoustic wave (8), one or more error transducers (16,214) sensing the output acoustic wave and providing one or more error signals (ϑ,e₂), and a plurality of adaptive filter channel models. Each channel model has a model input from a respective error transducer (16,214). One or more of the channel models also has a model input from at least one of the remaining channel models. Each channel model has an error input from one or more of the error transducers (16,214). Each channel model has a model output outputting a correction signal (312,316) to a respective output transducer (14,210) to introduce the respective canceling acoustic wave. The correction signal (312,316) from one or more of the model outputs is also input to the model input of one or more of the remaining channel models.
摘要翻译：用于衰减相关输入声波的多声道主动声衰减系统具有一个或多个输出换能器，其引入一个或多个相应的取消声波以衰减输入声波并产生衰减的输出声波，一个或多个误差换能器感测输出声波并提供一个或多个误差信号，以及多个自适应滤波器通道模型。每个通道模型具有来自相应误差传感器的模型输入。一个或多个通道模型还具有来自剩余通道模型中的至少一个的模型输入。每个通道模型都有一个或多个误差传感器的误差输入。每个通道模型具有模型输出，将校正信号输出到相应的输出换能器以引入相应的消除声波。来自一个或多个模型输出的校正信号也被输入到一个或多个剩余通道模型的模型输入。

6. 发明公开

EP0385713A3 Noise reducing receiver device 失效
标题翻译：噪音降低接收器设备
公开(公告)号：EP0385713A3
公开(公告)日：1991-08-21
申请号：EP90302057.6
申请日：1990-02-27
申请人： SONY CORPORATION
发明人： Sasaki, Tooru , Ohkubo, Masashi , Kimura, Aktra
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , G10K2210/108 , G10K2210/1081 , G10K2210/3011 , G10K2210/30232 , G10K2210/3217
摘要： The present invention is concerned with a receiver device for converting electrical signal from a headphone (4), a telephone receiver or the like into acoustic signals and outputting these acoustic signals. More particularly, it relates to a noise reducing receive device in which acoustic signals in the vicinity of an electro-acoustic transducer element (4) are converted by a microphone (6) into electrical signals and negatively fed back to an amplifier circuit (13) which is adapted for amplifying input electrical signals and supplying the amplified signals to the electro-acoustic transducer element (4). With the present noise reducing receiver device, the input electrical signals are amplified by the amplifier circuit (13) and converted by the electro-acoustic transducer element (4) into acoustic signals, which are output as output acoustic signals. A microphone (6) is arranged in the vicinity of the electro-acoustic transducer element and adapted for converting the output acoustic signals and external noises into electrical signals, which are negatively fed back to the amplifier circuit (13) via feedback circuit (7). The output acoustic signals may be heard at the desired noise reduction level by having the transfer function H of the electro-acoustic transducer element (4), the transfer function A of the amplifier circuit (13), the transfer function M of the microphone (6) and the transfer function β of the feedback circuit (7) presettable within the range of |AHMβ|» 1.

7. 发明授权

EP0040613B1 IMPROVED METHOD AND APPARATUS FOR CANCELLING VIBRATION 失效
标题翻译：改进的方法和装置取消振动
公开(公告)号：EP0040613B1
公开(公告)日：1986-02-05
申请号：EP80902179.3
申请日：1980-11-21
申请人： SOUND ATTENUATORS LIMITED
发明人： CHAPLIN, George Brain Barrie
IPC分类号： G10K11/16
CPC分类号： G10K11/178 , G10K2210/10 , G10K2210/12 , G10K2210/128 , G10K2210/3011 , G10K2210/3045 , G10K2210/3217 , G10K2210/3222
摘要： PCT No. PCT/GB80/00201 Sec. 371 Date Jul. 15, 1981 Sec. 102(e) Date Jul. 15, 1981 PCT Filed Nov. 21, 1980 PCT Pub. No. WO81/01480 PCT Pub. Date May 28, 1981.Improved method and apparatus for the nulling of a primary vibration by the "active" method, based on the "virtual earth" system in which the output of a loudspeaker (3') is continually controlled by a feedback loop (1', 2' 3') to maintain a null at a microphone (1') disposed adjacent to the loudspeaker. In accordance with the invention the loop (1', 2', 3') is used as a generator for the correct waveform of the secondary vibration required to null the primary vibration, the amplitude at which the secondary vibration is projected into the primary vibration being increased to move the null point to the far field of the loudspeaker (3').

8. 发明公开

EP0083718A1 Noise-reduction device for stationary induction apparatus 失效
标题翻译： RauschverminderungseinrichtungfürstationäreInduktionsvorrichtung。
公开(公告)号：EP0083718A1
公开(公告)日：1983-07-20
申请号：EP82110831.3
申请日：1982-11-23
申请人： Hitachi, Ltd.
发明人： Hori, Yasuro , Kanoi, Minoru , Hagiwara, Syuya
IPC分类号： H01F27/33 , G10K11/16
CPC分类号： H01F27/33 , G10K11/178 , G10K2210/125 , G10K2210/1291 , G10K2210/3011 , G10K2210/3013 , G10K2210/3216 , G10K2210/509
摘要： A noice-reduction device for a stationary induction apparatus is disclosed in which sound insulation panels (4) for reducing the noises radiated from the side walls (2) of a tank (1) are mounted on the reinforcing channel (3) protruded outside of the tank (1) of the induction apparatus. Vibration sensors (5) detect the vibrations transmitted from the tank (1) to the sound insulation panels (4) through the reinforcing channels (3). Vibrators (6) apply vibrations of opposite phase to the vibrations detected by the vibration sensors (5). The vibration sensors (5) and vibrators (6) make up vibration cancelling devices.
摘要翻译：公开了一种用于固定式感应装置的减噪装置，其中用于减少从罐（1）的侧壁（2）辐射的噪声的隔音板（4）安装在突出在罐（1）外侧的增强通道感应装置的罐（1）。振动传感器（5）通过加强通道（3）检测从罐（1）传递到隔音板（4）的振动。振动器（6）对由振动传感器（5）检测到的振动施加相反相位的振动。振动传感器（5）和振动器（6）构成振动消除装置。

9. 发明公开

EP0967592A3 Variable gain active noise cancellation system with improved residual noise sensing 失效
标题翻译：活性Lärmunterdruckungsanordnung可变增益和改善的残余噪声测量
公开(公告)号：EP0967592A3
公开(公告)日：2000-03-15
申请号：EP99203047.8
申请日：1994-06-23
申请人： NOISE CANCELLATION TECHNOLOGIES, INC.
发明人： Jones, Owen
IPC分类号： G10K11/178
CPC分类号： G10K11/17857 , A61F2011/145 , G10K11/17855 , G10K11/17881 , G10K11/17885 , G10K2210/108 , G10K2210/1081 , G10K2210/3011 , G10K2210/3013 , G10K2210/3019 , G10K2210/3028 , G10K2210/3056 , G10K2210/3214 , G10K2210/503
摘要： An active noise cancellation system includes a series of features for more effective cancellation, greater reliability, and improved stability. A particular feature adapted for headset systems includes locating a residual microphone radially offset from the centre of a sound generator to detect a signal more similar to that incident upon the eardrum of the user. In addition, an open back headset design includes perforations on the side of the headset instead of the back, so that the perforations are less susceptible to inadvertent blockage. The system also includes a mechanism for detecting changes in the acoustic characteristics of the environment that may be caused, for example, by pressure exerted upon the earpieces, and that may destabilize the cancellation system. The system automatically responds to such changes, for example, by reducing the gain or the frequency response of the system to preserve stability. The system further includes other methods for detecting imminent instability and compensating, such as detecting the onset of signals within enhancement frequencies characteristic of the onset of instability, and adjusting the gain of frequency response of the system or suppressing the enhanced signals. The system further includes a mechanism for conserving battery life by turning the system off when sound levels are low, or adjusting the power supply to the system to correspond to the current power requirements of the system.

10. 发明公开

EP0967592A2 Variable gain active noise cancellation system with improved residual noise sensing 失效
标题翻译： AktiveLärmunterdruckungsanordnungmit variablerVerstärkungund verbesserterRestlärmmessung
公开(公告)号：EP0967592A2
公开(公告)日：1999-12-29
申请号：EP99203047.8
申请日：1994-06-23
申请人： NOISE CANCELLATION TECHNOLOGIES, INC.
发明人： Jones, Owen
IPC分类号： G10K11/178
CPC分类号： G10K11/17857 , A61F2011/145 , G10K11/17855 , G10K11/17881 , G10K11/17885 , G10K2210/108 , G10K2210/1081 , G10K2210/3011 , G10K2210/3013 , G10K2210/3019 , G10K2210/3028 , G10K2210/3056 , G10K2210/3214 , G10K2210/503
摘要： An active noise cancellation system includes a series of features for more effective cancellation, greater reliability, and improved stability. A particular feature adapted for headset systems includes locating a residual microphone radially offset from the centre of a sound generator to detect a signal more similar to that incident upon the eardrum of the user. In addition, an open back headset design includes perforations on the side of the headset instead of the back, so that the perforations are less susceptible to inadvertent blockage. The system also includes a mechanism for detecting changes in the acoustic characteristics of the environment that may be caused, for example, by pressure exerted upon the earpieces, and that may destabilize the cancellation system. The system automatically responds to such changes, for example, by reducing the gain or the frequency response of the system to preserve stability. The system further includes other methods for detecting imminent instability and compensating, such as detecting the onset of signals within enhancement frequencies characteristic of the onset of instability, and adjusting the gain of frequency response of the system or suppressing the enhanced signals. The system further includes a mechanism for conserving battery life by turning the system off when sound levels are low, or adjusting the power supply to the system to correspond to the current power requirements of the system.
摘要翻译：有源噪声消除系统包括一系列功能，可以更有效的消除，更高的可靠性和更好的稳定性。适用于耳机系统的特定特征包括将距离声发生器中心径向偏移的剩余麦克风定位成检测更类似于在用户鼓膜上入射的信号。此外，开放式耳机设计包括耳机侧面的穿孔而不是背部，使得穿孔不易受到意外的堵塞。该系统还包括用于检测可能由例如通过施加在听筒上的压力引起的环境的声学特性的变化的机构，并且可能使取消系统不稳定。系统自动响应这种变化，例如通过降低系统的增益或频率响应来保持稳定性。该系统还包括用于检测即将发生的不稳定性和补偿的其他方法，例如检测不稳定性开始特征的增强频率内的信号的开始，以及调整系统的频率响应的增益或抑制增强的信号。该系统还包括一种机构，用于通过在声级较低时关闭系统来节省电池寿命，或者调整系统的电源以对应于系统的当前功率需求。

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