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71. 发明授权

US5390255A Active acoustic attenuation system with error and model copy input 失效
标题翻译：主动声衰减系统具有错误和型号复制输入
公开(公告)号：US5390255A
公开(公告)日：1995-02-14
申请号：US175688
申请日：1993-12-30
申请人： Steven R. Popovich
发明人： Steven R. Popovich
IPC分类号： G10K11/178 , H03B29/00
CPC分类号： G10K11/1782 , G10K2210/3011 , G10K2210/3012 , G10K2210/30232 , G10K2210/3049
摘要： An active acoustic attenuation system attenuates a correlated input acoustic wave and eliminates the need for an input transducer sensing such wave and also eliminates the need to sum a filtered modification of the model output correction signal with the error signal as an input to the model. The error signal is instead summed with the model input signal provided through a model copy, and the output resultant sum is supplied as the input to the model. A summer sums the error signal from the error transducer and the output of a copy of the adaptive filter model and supplies the resultant sum to the model input. Another copy of a model modeling the output transducer and the error path between the output transducer and the error transducer is connected in series between the model input and the input of the first noted model copy.
摘要翻译：主动声衰减系统衰减相关的输入声波，并且消除了对感测这种波的输入换能器的需要，并且还消除了将模型输出校正信号的滤波修改与误差信号相加的模型的输入的需要。误差信号与通过模型拷贝提供的模型输入信号相加，输出结果和作为模型的输入提供。夏季将来自误差传感器的误差信号和自适应滤波器模型的副本的输出相加，并将得到的和提供给模型输入。对输出传感器建模的模型的另一个模型以及输出传感器和误差传感器之间的误差路径串联连接在模型输入和第一个模型拷贝的输入之间。

72. 发明授权

US5386477A Active acoustic control system matching model reference 失效
标题翻译：主动声控系统配套模型参考
公开(公告)号：US5386477A
公开(公告)日：1995-01-31
申请号：US16694
申请日：1993-02-11
申请人： Steven R. Popovich , Trevor A. Laak , Mark C. Allie
发明人： Steven R. Popovich , Trevor A. Laak , Mark C. Allie
IPC分类号： F01N1/00 , G10K11/178 , H03H17/00 , H03H21/00 , H04B3/04 , G10K11/16
CPC分类号： G10K11/178 , G10K2210/129 , G10K2210/30232 , G10K2210/3035 , G10K2210/3049
摘要： An acoustic system (20) includes a model reference (22) having a selectably programmable response, and an active model (24) including in combination an acoustic path (26) and an adaptive filter (28) such that the combination of the acoustic path (26) and the adaptive filter (28) adaptively models the model reference (22) such that the combined response of the acoustic path (26) and the adaptive filter (28) provides an active model response matching the response of the model reference (22).
摘要翻译：声学系统（20）包括具有可选择地可编程响应的模型参考（22）和包括声学路径（26）和自适应滤波器（28）的组合的有源模型（24），使得声学路径（26）和自适应滤波器（28）对模型参考（22）自适应地建模，使得声路径（26）和自适应滤波器（28）的组合响应提供与模型参考的响应匹配的有效模型响应 22）。

73. 发明授权

US5384853A Active noise reduction apparatus 失效
标题翻译：主动降噪装置
公开(公告)号：US5384853A
公开(公告)日：1995-01-24
申请号：US033748
申请日：1993-03-18
申请人： Akio Kinoshita , Kazuhiro Doi , Kenichiro Muraoka , Isutomu Hamabe
发明人： Akio Kinoshita , Kazuhiro Doi , Kenichiro Muraoka , Isutomu Hamabe
IPC分类号： F01N1/06 , G10K11/178 , H03H21/00 , H04B3/04 , H03B29/00
CPC分类号： G10K11/1786 , G10K2210/12821 , G10K2210/30232 , G10K2210/3039 , G10K2210/3046 , G10K2210/3049
摘要： An apparatus for active reduction of noises transmitted from a noise source into a space. The active noise reduction apparatus comprises residual noise sensors for detecting the residual noises in the space. A reference signal is produced based upon the noise generating condition of the noise source. The reference signal is used, along with the detected residual noises, to drive control sound sources so as to reduce the noises in the space. A filter is adjusted to correspond to acoustic transfer characteristics between the control sound sources and the residual noise sensors. An identification sound is generated to correspond to the background noise level detected in the space and to the spectral distribution of the noises transmitted into the space. The coefficients of the filter are updated according to acoustic transfer characteristics between the control sound sources and the residual noise sensors. The acoustic transfer characteristics are obtained based upon the identification sound and the residual noises.
摘要翻译：一种用于将从噪声源传送到空间中的噪声主动减少的装置。有源噪声降低装置包括用于检测空间中的残留噪声的残余噪声传感器。基于噪声源的噪声产生条件产生参考信号。使用参考信号以及检测到的残留噪声来驱动控制声源，以减少空间中的噪声。调整滤波器以对应于控制声源和残余噪声传感器之间的声传递特性。产生识别声音以对应于在空间中检测到的背景噪声电平和发送到空间中的噪声的频谱分布。根据控制声源和残留噪声传感器之间的声传递特性来更新滤波器的系数。基于识别声和残留噪声获得声传递特性。

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