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32 条记录 (耗时 0.012 秒)

    Noise reduction method, device, and system
    3.
    发明公开
    Noise reduction method, device, and system 审中-公开
    降噪方法，设备和系统

    公开(公告)号：EP2682940A2

    公开(公告)日：2014-01-08

    申请号：EP13171515.3

    申请日：2013-06-11

    申请人： Huawei Technologies Co., Ltd.

    发明人： Li, Baosheng ,  Zhai, Liqian ,  Chi, Shanjiu

    IPC分类号： G10K11/175

    CPC分类号： H04R3/002 ,  G10K11/175 ,  G10K11/178 ,  G10K2210/109 ,  G10K2210/3033

    摘要： Embodiments of the present invention provide a noise reduction method, device, and system. In the embodiments of the present invention, operating condition information of a noise source is obtained, where the operating condition information represents an operating condition of the noise source, then sound wave information corresponding to the obtained operating condition information is determined according to a pre-set mapping between the operating condition information and the sound wave information, and active noise reduction is performed by using the corresponding sound wave information. Steps such as collection, conversion, and calculation for noise generated by the noise source are not required, thereby shortening time for the active noise reduction.

    摘要翻译： 本发明的实施例提供了降噪方法，设备和系统。 在本发明的实施例中，获取噪声源的运行状况信息，其中运行状况信息表示噪声源的运行状况，则根据预先确定的噪声源确定与获取的运行状况信息对应的声波信息， 设置操作条件信息和声波信息之间的映射，并且通过使用相应的声波信息来执行主动降噪。 诸如收集，转换和计算由噪声源产生的噪声等步骤不是必需的，因此缩短了主动降噪的时间。

    Fan noise canceller
    5.
    发明公开
    Fan noise canceller 失效
    风机消声器

    公开(公告)号：EP0818771A3

    公开(公告)日：1999-01-13

    申请号：EP97111530.8

    申请日：1997-07-08

    申请人： NEC CORPORATION

    发明人： Okada, Takayuki

    IPC分类号： G10K11/178

    CPC分类号： F04D29/663 ,  F05B2260/962 ,  G10K11/178 ,  G10K2210/109 ,  G10K2210/3026 ,  G10K2210/3027 ,  G10K2210/3032 ,  G10K2210/503 ,  G10K2210/511

    摘要： A fan noise canceller comprises a rotation information detecting means 2 (or 12) for detecting noise information of a fan 1 (11), a band-pass filter 3 (13) for extracting the blade passing frequency from the noise information, an output control means 4 (14) for controlling the amplitude and phase of the blade passing frequency signal of the extracted noise information, and a cancelling loud-speaker 2 (25) for converting the output of the output control means 4 (41) into a sound signal. The rotation information detecting mean 2 (21) Yincludes a rotatable disc 2A coupled to the shaft of the fan 1 (11) and carrying change information corresponding to the number of fan blades, and a photo-interrupter 2B for outputting signals of the blade passing frequency and harmonics thereof contained in the rotation information of the rotatable disc 2A as electric signals.

    ACTIVE NOISE CONTROL
    6.
    发明公开
    ACTIVE NOISE CONTROL 失效
    有源噪声干扰的设备。

    公开(公告)号：EP0533916A1

    公开(公告)日：1993-03-31

    申请号：EP92912294.0

    申请日：1992-04-03

    申请人： APPLIED ACOUSTIC RESEARCH INC.

    发明人： WARNAKA, Glenn, E. ,  ROBEY, Robert

    IPC分类号： G10K11

    CPC分类号： G10K11/178 ,  G10K2210/109 ,  G10K2210/112 ,  G10K2210/121 ,  G10K2210/3011 ,  G10K2210/3033 ,  G10K2210/3214

    摘要： A system for reducing noise of a noise generator such as a fan located in a housing includes a short duct directing air to the fan housing. An input transducer is located in the duct at a position further removed from the fan than a cancellation noise source which is also located in the duct. An electronic controller with embedded frequencies related to the steady state operation of the fan inputs cancellation signals to the cancellation source. The input transducer also responds to the random noise of the fan to provide control signals to the controller for generating signals for the cancellation source. The input duct can be multi-cellular with respect of the input transducer and the cancellation source.

    A turbulence-shield for a mcirophone in a wall-cavity
    10.
    发明公开
    A turbulence-shield for a mcirophone in a wall-cavity 失效
    Eine Turbulenzabschirmungfürein Mikrophon in einer Wandaussparung

    公开(公告)号：EP0883104A2

    公开(公告)日：1998-12-09

    申请号：EP98630022.6

    申请日：1998-05-29

    申请人： CARRIER CORPORATION

    发明人： Rainey, James T. ,  McCormick, Duane C. ,  Daniels, Mark A. ,  Chou, Shau-Tak R.

    IPC分类号： G10K11/178

    CPC分类号： G10K11/002 ,  G10K11/17857 ,  G10K11/17861 ,  G10K11/17875 ,  G10K11/17881 ,  G10K2210/1082 ,  G10K2210/109 ,  G10K2210/112 ,  G10K2210/507

    摘要： A cavity (32) is provided external to a duct or fan discharge (10) in an ANC system such that the duct liner or porous material (11) separates the interior of the duct (10) from the cavity (32). A microphone (16) is located in the cavity (32). Baffles (34) of porous material are preferably located in the cavity (32) so as to divide the cavity (32) into a plurality of chambers (32-1,32-2) to reduce internal flow recirculation in the cavity (32).

    摘要翻译： 空腔（32）设置在ANC系统中的管道或风扇排放口（10）的外部，使得管道衬垫或多孔材料（11）将管道（10）的内部与空腔（32）分离。 麦克风（16）位于空腔（32）中。 多孔材料的挡板（34）优选地位于空腔（32）中，以便将空腔（32）分成多个室（32-1,32-2），以减少空腔（32）内的内部流动循环， 。