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84 条记录 (耗时 0.013 秒)

    METHOD AND APPARATUS FOR PROCESSING SOUND
    31.
    发明授权
    METHOD AND APPARATUS FOR PROCESSING SOUND 失效
    方法和设备音效剪辑

    公开(公告)号：EP1010166B1

    公开(公告)日：2005-03-16

    申请号：EP97913229.7

    申请日：1997-11-27

    申请人： Panphonics Oy ,  KIRJAVAINEN, Kari

    发明人： KIRJAVAINEN, Kari

    IPC分类号： G10K11/178

    CPC分类号： G10K11/178 ,  A61F2011/145 ,  G10K2210/108 ,  G10K2210/3026 ,  G10K2210/3217

    摘要： The invention relates to a method and an apparatus for sound processing, where sound is attenuated by measuring it and by producing with an actuator a sound field of opposite sign in view of the original sound field. A desired value signal (I) is supplied to the actuator which reproduces the signal. To the actuator is attached a sensor, measuring sound pressure, and the difference of the sensor signal (B) and the desired value signal (I) is applied as high gain feedback to the actuator. As a consequence, sound not pertaining to the desired value signal (I) can be attenuated in a simple manner, and sound in accordance with the desired value signal (I) can be produced simultaneously with the same apparatus.

    NOISE CANCELLATION EARPIECE
    32.
    发明授权
    NOISE CANCELLATION EARPIECE 失效
    OHR一部分噪声降低

    公开(公告)号：EP0975293B1

    公开(公告)日：2004-10-27

    申请号：EP98913238.6

    申请日：1998-03-31

    申请人： GN Netcom A/S

    发明人： TAENZER, Jon, C. ,  PUTHUFF, Steven, H. ,  PLUVINAGE, Vincent

    IPC分类号： A61F11/06 ,  G10K11/178

    CPC分类号： H04M1/6058 ,  G10K11/178 ,  G10K2210/1081 ,  G10K2210/3026 ,  G10K2210/3217 ,  H04B1/385 ,  H04M1/19 ,  H04M1/271 ,  H04R25/453 ,  H04R2225/43

    摘要： A communications earpiece comprises an ear canal tube sized for positioning in an ear canal of a user so that the ear canal is at least partially open for directly receiving ambient sounds. A microphone port in the ear canal tube is located in the ear canal for detecting sounds in the ear canal. A speaker port in the ear canal tube is located in the ear canal in close proximity to the microphone port for broadcasting sound signals into the ear canal. A sound processor amplifies the ambient sounds received by the microphone to produce processed analog signals. The sound processor also comprises noise cancellation means for producing an inverse noise signal of noise detected in the ear canal by the microphone. The inverse noise signal is sent to the speaker port so as to be broadcast into the ear canal thereby substantially canceling the ambient noise in the ear canal.

    Offline active control of automotive noise
    35.
    发明公开
    Offline active control of automotive noise 审中-公开
    离线的aktive Regelung zur Verminderung vonMotorgeräuschen

    公开(公告)号：EP1148469A2

    公开(公告)日：2001-10-24

    申请号：EP01105548.0

    申请日：2001-03-06

    申请人： SIEMENS CANADA LIMITED

    发明人： McLean, Ian R.

    IPC分类号： G10K11/178

    CPC分类号： G10K11/178 ,  G10K2210/12822 ,  G10K2210/3033 ,  G10K2210/3214 ,  G10K2210/3217 ,  G10K2210/3219

    摘要： The active noise attenuation system comprises a speaker, a control unit in communication with the speaker, and a memory unit in communication with the control unit storing cancellation waveform data. The system uses the stored cancellation waveform data to create a cancellation waveform through a speaker in proximity to an air induction system to thereby attenuate engine noise. Sensors serve to trigger the release of the cancellation waveform as well as to affect the form of the cancellation waveform to ensure noise attenuation.

    摘要翻译： 有源噪声衰减系统包括扬声器，与扬声器通信的控制单元，以及与控制单元通信的存储单元，其存储抵消波形数据。 系统使用所存储的取消波形数据，通过靠近空气感应系统的扬声器产生消除波形，从而衰减发动机噪声。 传感器用于触发消除波形的释放以及影响消除波形的形式以确保噪声衰减。

    NONLINEAR REDUCED-PHASE FILTERS FOR ACTIVE NOISE CONTROL
    36.
    发明授权
    NONLINEAR REDUCED-PHASE FILTERS FOR ACTIVE NOISE CONTROL 失效
    随着对主动降噪缩小非线性滤波

    公开(公告)号：EP0907948B1

    公开(公告)日：2000-06-21

    申请号：EP97924712.9

    申请日：1997-05-14

    申请人： UNITED TECHNOLOGIES CORPORATION

    发明人： JACOBSON, Clas, A. ,  MCCORMICK, Duane, C.

    IPC分类号： G10K11/178

    CPC分类号： G10K11/17875 ,  G10K11/17854 ,  G10K2210/129 ,  G10K2210/3026 ,  G10K2210/30391 ,  G10K2210/3217 ,  G10K2210/3229

    摘要： An active noise (or vibration) control system having an actuator 24 which provides an acoustic anti-noise signal in response to an drive signal (U), an error sensor 16 which senses the acoustic anti-noise signal from the actuator, senses disturbance noise (d), and provides an error signal (e) indicative of a combination thereof, and a controller 20, responsive to the error signal (e), which provides the drive signal (U) to the actuator 24, is provided with controller compensation 78 having energy states 112 and having non-linear reset logic 130 which temporarily resets the energy states 112 in the filter 78 to zero when the error signal crosses zero, thereby improving the bandwidth of the active noise control system.

    METHOD AND DEVICE FOR ACTIVE NOISE REDUCTION IN A LOCAL AREA
    39.
    发明授权
    METHOD AND DEVICE FOR ACTIVE NOISE REDUCTION IN A LOCAL AREA 失效
    方法和设备在近主动降噪

    公开(公告)号：EP0651907B1

    公开(公告)日：1997-10-15

    申请号：EP93916308.5

    申请日：1993-07-09

    申请人： SINVENT A/S

    发明人： KROKSTAD, Asbjorn ,  PETTERSEN, Odd, K. Ostern ,  SORSDAL, Svein

    IPC分类号： G10K11/16

    CPC分类号： G10K11/178 ,  G10K2210/1282 ,  G10K2210/3045 ,  G10K2210/3217 ,  G10K2210/3221

    摘要： PCT No. PCT/NO93/00114 Sec. 371 Date Mar. 21, 1995 Sec. 102(e) Date Mar. 21, 1995 PCT Filed Jul. 9, 1993 PCT Pub. No. WO94/02935 PCT Pub. Date Feb. 3, 1994A method for active noise reduction based on destructive interference of sound waves in order to reduce the energy in a sound field employs two omnidirectional microphones (M1, M2) provided in connection with a loudspeaker. The acoustic feedback of the microphones is eliminated by a closed loop consisting of the microphones and the loudspeaker. The loudspeaker used is an open loudspeaker with a dipole characteristic, thus causing one of the microphones to be more sensitive to the far field and thereby to the noise which has to be suppressed. The method is implemented by a device which comprises a digital signal processor (DSP) for processing the microphone signals and which transmits an output signal to the loudspeaker where the feedback component from the loudspeaker is substantially eliminated, while the output signal's phase and amplitude are adjusted in such a manner that an effective cancellation of the noise is obtained in an area around the loudspeaker's near field. The DSP can preferably be implemented in the form of software modules on an integrated circuit. With the method and the device an integrated reduction in noise level of almost 20 dB is achieved depending on how the filtering in the DSP is adapted. In practice a quiet zone can be obtained in the loudspeaker's near field with an attenuation band which extends from approximately 100-500 Hz.