公开(公告)号：EP1363270A3

公开(公告)日：2004-01-07

申请号：EP03076295.9

申请日：2003-05-01

申请人： Siemens VDO Automotive Inc.

发明人： Daly, Paul Desmond

IPC分类号： G10K11/178

CPC分类号： G10K11/178 ,  G10K2210/1282 ,  G10K2210/3225 ,  G10K2210/3229 ,  G10K2210/505 ,  G10K2210/51

摘要： An active noise control system (100) and method modifies a noise made when a vehicle closure, such as a door, hood, or trunk, closes by detecting the closure's velocity and selecting a delay time and control noise amplitude appropriate for the velocity. By modifying the noise of a vehicle door closing, the system (100) can reduce the frequency and reverberation of the noise generated by the door, improving user perception of the vehicle itself.

公开(公告)号：EP0799429A1

公开(公告)日：1997-10-08

申请号：EP95940389.0

申请日：1995-12-15

申请人： GECO A.S.

发明人： IKELLE, Luc, Thomas ,  ROBERTS, Graham

IPC分类号： G01V1 ,  G01V13 ,  G10K11

CPC分类号： G10K11/178 ,  G01V1/36 ,  G01V13/00 ,  G01V2210/56 ,  G10K2210/108 ,  G10K2210/127 ,  G10K2210/3012 ,  G10K2210/505

摘要： The signature of an energy source is determined from an inverse scattering Born series representing multiple reflected energy. The series comprises a polynomial in the inverse of the signature and has recorded data as the first term. The series is truncated, preferably to the first two terms to permit an analytical determination of the signature to be found. The value of the inverse signature which minimises the energy represented by the sub-series is found and this corresponds to the desired source signature. An iterative scheme may be adopted to improve the match to the actual signature so as to take into account the errors caused by truncating the scattering series.

公开(公告)号：EP0104660B1

公开(公告)日：1987-12-09

申请号：EP83109708.4

申请日：1983-09-28

申请人： NEC CORPORATION

发明人： Ito, Yoshinori

IPC分类号： H04B3/23

CPC分类号： G10K11/178 ,  G10K2210/30351 ,  G10K2210/3045 ,  G10K2210/505 ,  H04B3/23

公开(公告)号：EP2978242A1

公开(公告)日：2016-01-27

申请号：EP15178142.4

申请日：2015-07-23

申请人： 2236008 Ontario Inc.

发明人： PARANJPE, Shreyas Anand

IPC分类号： H04R3/02

CPC分类号： H04R3/02 ,  G10K11/178 ,  G10K2210/108 ,  G10K2210/1282 ,  G10K2210/3025 ,  G10K2210/505 ,  G10K2210/506 ,  G10L21/0232 ,  H04M9/082 ,  H04R2227/009 ,  H04R2499/13

摘要： A system and method for mitigating audio feedback may calculate a smoothed frequency spectrum of an audio signal. Previously detected candidate feedback tones may be obtained. Candidate feedback tones may be determined responsive to a frequency spectrum of the audio signal, the smoothed frequency spectrum and the previously detected candidate feedback tones. One or more signal characteristics associated with the audio signal and feedback coefficients associated with the candidate feedback tones may be obtained. The feedback coefficients may be modified responsive to the one or more signal characteristics. Actionable feedback tones may be determined responsive to the associated feedback coefficients exceeding a respective feedback threshold. Feedback suppression coefficients associated with each of the determined actionable feedback tones may be generated and may be utilized to suppress the actionable feedback tones.

摘要翻译： 用于减轻音频反馈的系统和方法可以计算音频信号的平滑频谱。 可以获得先前检测到的候选反馈音。 候选反馈音可以响应于音频信号的频谱，平滑的频谱和先前检测的候选反馈音来确定。 可以获得与音频信号相关联的一个或多个信号特性和与候选反馈音调相关联的反馈系数。 可以响应于一个或多个信号特征来修改反馈系数。 响应于超过相应反馈阈值的相关联的反馈系数可以确定可操作的反馈音调。 可以产生与确定的可操作的反馈音调中的每一个相关联的反馈抑制系数，并且可以用于抑制可操作的反馈音调。

公开(公告)号：EP2733957A1

公开(公告)日：2014-05-21

申请号：EP13193065.3

申请日：2013-11-15

申请人： Bit Wave Pte Ltd

发明人： Hui, Siew Kok ,  Tan, Eng Sui

IPC分类号： H04R5/033 ,  G08G1/0965 ,  G10L21/0208 ,  H04R1/40

CPC分类号： G10K11/1786 ,  G08B3/00 ,  G08G1/0965 ,  G10K11/178 ,  G10K2210/1081 ,  G10K2210/3014 ,  G10K2210/3046 ,  G10K2210/505 ,  G10L21/00 ,  H04R1/406 ,  H04R5/033 ,  H04R5/0335

摘要： Boomless-microphones are described for a wireless helmet communicator with siren signal detection and classification capabilities. An acoustic component receives an audio signal and comprises a left acoustic sensor and a right acoustic sensor. The left acoustic sensor is mountable or attachable to the surface of a left wall of a helmet and the right acoustic sensor is mountable or attachable to the surface of a right wall. A speaker component can generate an echoless audio signal via signal inversion of the audio signal, outputs to a left speaker mountable or attachable to a left ear area of the helmet and a right speaker mountable or attachable to a right ear area of the helmet. A signal enhancement component can increase an intensity of the first audio signal associated with an emergency siren based on a determined proximity of an emitting emergency vehicle or emergency object to the device.

摘要翻译： 无线麦克风描述为具有警号信号检测和分类功能的无线头盔通信器。 声学部件接收音频信号并包括左声传感器和右声传感器。 左声传感器可安装或附接到头盔左壁的表面，右声传感器可安装或附接到右壁表面。 扬声器部件可以通过音频信号的信号反转产生无回声音频信号，输出到可安装或可附接到头盔的左耳区域的左扬声器，以及可安装或附接到头盔右耳区域的右扬声器。 信号增强部件可以基于发射的紧急车辆或紧急物体的确定的接近度来增加与紧急警报器相关联的第一音频信号的强度。

公开(公告)号：EP1088298B1

公开(公告)日：2003-11-12

申请号：EP99931307.5

申请日：1999-06-17

申请人： Genelec OY

发明人： MÄKIVIRTA, Aki ,  VARLA, Ari

IPC分类号： G10K11/178 ,  H04S1/00

CPC分类号： H04S7/30 ,  G10K11/178 ,  G10K2210/12 ,  G10K2210/505

摘要： A method and apparatus for attenuating acoustic reflections related to sound radiated by a loudspeaker in an acoustic space. According to the method, at least one cancelling loudspeaker is used for radiating a canceling sound in the space. The signal required for producing the cancelling sound is sampled from the sound reproduction apparatus prior to the processing of the original sound signal for emission into the acoustic space. The sample signal is low-pass filtered, delayed, amplified and inverted prior to being taken to the cancelling loudspeaker. The sound reproduction apparatus includes a signal sampling device, control devices, and at least one cancelling loudspeaker for radiating the cancelling sound.

公开(公告)号：EP1088298A1

公开(公告)日：2001-04-04

申请号：EP99931307.5

申请日：1999-06-17

申请人： Genelec OY

发明人： MÄKIVIRTA, Aki ,  VARLA, Ari

IPC分类号： G10K11/178 ,  H04S1/00

CPC分类号： H04S7/30 ,  G10K11/178 ,  G10K2210/12 ,  G10K2210/505

摘要： A method and apparatus for attenuating acoustic reflections related to sound radiated by a loudspeaker in an acoustic space. According to the method, at least one cancelling loudspeaker is used for radiating a canceling sound in the space. The signal required for producing the cancelling sound is sampled from the sound reproduction apparatus prior to the processing of the original sound signal for emission into the acoustic space. The sample signal is low-pass filtered, delayed, amplified and inverted prior to being taken to the cancelling loudspeaker. The sound reproduction apparatus includes a signal sampling device, control devices, and at least one cancelling loudspeaker for radiating the cancelling sound.

公开(公告)号：EP0766228A3

公开(公告)日：1998-05-06

申请号：EP95630128

申请日：1995-11-30

申请人： SAMSUNG HEAVY IND

发明人： KIM WON YOUNG ,  KIM YANG HAN ,  KANG SEONG WOO

IPC分类号： F01N1/00 ,  G10K11/16 ,  G10K11/178

CPC分类号： G10K11/178 ,  G10K2210/106 ,  G10K2210/3016 ,  G10K2210/3216 ,  G10K2210/505

摘要： A method of and an apparatus for controlling noise generated in a confined space, being capable of reducing a radiating sound pressure generated from a main noise source (3) to that of an optimal state. The method includes the steps of measuring (4) the radiating sound pressure generated from the noise source (3), and generating, from an additional sound source (1), a radiating sound pressure having the same magnitude as the radiating sound pressure generated from the noise source (3) while having a phase 180 DEG -shifted from that of the noise source's radiating sound pressure so that the radiating sound pressures can offset each other when they are mixed. The apparatus includes an additional sound source (1) installed in the confined space, an intensity converter (11) for collecting and measuring sound pressure signals respectively generated from the noise source (3) and the additional sound source (1), and a microcomputer for applying, to the additional sound source (1), a control signal for reducing the noise on the basis of the sound pressure signals measured by the intensity converter (11).

公开(公告)号：EP0766228A2

公开(公告)日：1997-04-02

申请号：EP95630128.7

申请日：1995-11-30

申请人： SAMSUNG HEAVY INDUSTRIES CO., LTD

发明人： Kim, Won Young ,  Kim, Yang Han ,  Kang, Seong Woo

IPC分类号： G10K11/178

CPC分类号： G10K11/178 ,  G10K2210/106 ,  G10K2210/3016 ,  G10K2210/3216 ,  G10K2210/505

摘要： A method of and an apparatus for controlling noise generated in a confined space, being capable of reducing a radiating sound pressure generated from a main noise source (3) to that of an optimal state. The method includes the steps of measuring (4) the radiating sound pressure generated from the noise source (3), and generating, from an additional sound source (1), a radiating sound pressure having the same magnitude as the radiating sound pressure generated from the noise source (3) while having a phase 180°-shifted from that of the noise source's radiating sound pressure so that the radiating sound pressures can offset each other when they are mixed. The apparatus includes an additional sound source (1) installed in the confined space, an intensity converter (11) for collecting and measuring sound pressure signals respectively generated from the noise source (3) and the additional sound source (1), and a microcomputer for applying, to the additional sound source (1), a control signal for reducing the noise on the basis of the sound pressure signals measured by the intensity converter (11).

摘要翻译： 一种用于控制在密闭空间中产生的噪声的方法和装置，能够将从主噪声源（3）产生的辐射声压降低到最佳状态。 该方法包括以下步骤：测量（4）从噪声源（3）产生的辐射声压，以及从附加声源（1）产生具有与从...产生的辐射声压相同的幅度的辐射声压 噪声源（3），同时具有与噪声源的辐射声压的相位180°的相位，使得辐射声压在混合时彼此抵消。 该装置包括安装在密闭空间中的附加声源（1），用于收集和测量从噪声源（3）和附加声源（1）分别产生的声压信号的强度转换器（11） 用于向附加声源（1）施加用于基于由强度转换器（11）测量的声压信号来降低噪声的控制信号。

公开(公告)号：EP2905778B1

公开(公告)日：2018-05-09

申请号：EP13845843.5

申请日：2013-06-04

申请人： Huawei Technologies Co., Ltd.

发明人： ZHAN, Wuzhou

IPC分类号： H04M9/08

CPC分类号： G10K11/175 ,  G10K2210/505 ,  H04M9/082

摘要： An echo cancelation method is disclosed. The method includes: dividing a to-be-processed audio signal into a to-be-processed high-band audio signal and a to-be-processed low-band audio signal; performing, by using an AEC module, adaptive filtering echo cancelation processing on the to-be-processed low-band audio signal, and skipping performing adaptive filtering echo cancelation processing on the to-be-processed high-band audio signal, to generate a preliminary echo cancelation signal; performing, by using an RES module, envelope prediction echo suppression on a high-band signal in a preliminary echo cancelation frequency domain signal, and calculating and outputting a residual echo suppression coefficient; performing, by using the RES module, echo suppression on a low-band signal in a preliminary echo cancelation frequency domain signal, and outputting a processing result; and multiplying the output result and the residual echo suppression coefficient, and outputting a signal of which echoes are canceled. In addition, an echo cancelation device is provided. In the embodiments of the present invention, high-band processing and low-band processing are separately performed on a to-be-processed signal, thereby not only effectively reducing a calculation amount of echo cancelation, but also solving a problem of echo leakage existing on sub-band edges in the prior art.