公开(公告)号：US5377275A

公开(公告)日：1994-12-27

申请号：US99005

申请日：1993-07-29

申请人： Seiichirou Suzuki

发明人： Seiichirou Suzuki

IPC分类号： F01N1/06 ,  G10K11/178 ,  H03B29/00 ,  A61F11/06

CPC分类号： F01N1/065 ,  G10K11/1784 ,  H03B29/00 ,  G10K2210/1082 ,  G10K2210/109 ,  G10K2210/112 ,  G10K2210/3045 ,  G10K2210/503

摘要： An active noise control apparatus comprises a secondary sound source for generating sound canceling noise emitted from a noise source, first and second microphones sequentially arranged between the noise source and the secondary sound source at a predetermined distance in a direction from the noise source to the secondary sound source, a coefficient multiplier for multiplying an output signal of the second microphone by a coefficient corresponding to a ratio of a transfer function of the first microphone with respect to the secondary sound source to that of the second microphone with respect thereto, a subtracter for obtaining a difference between a multiplication resultant signal and an output signal of the first microphone, and a signal processor for outputting a secondary sound signal obtained by multiplying the difference signal with a predetermined coefficient to the secondary sound source.

摘要翻译： 一种主动噪声控制装置，包括：用于产生从噪声源发出的声音消除噪声的次级声源;在从噪声源到次级的方向上以预定距离顺序排列在噪声源和次声源之间的第一和第二麦克风 声源，用于将第二麦克风的输出信号乘以对应于第一麦克风相对于次声源的传递函数与第二麦克风相对于第二麦克风的传递函数的比率的系数的系数乘法器， 获得乘积结果信号和第一麦克风的输出信号之间的差异;以及信号处理器，用于输出通过将该差分信号与预定系数相乘而获得的辅助声音信号到辅助声源。

公开(公告)号：US5251262A

公开(公告)日：1993-10-05

申请号：US723420

申请日：1991-06-28

申请人： Seiichirou Suzuki ,  Susumu Saruta ,  Hiroshi Tamura

发明人： Seiichirou Suzuki ,  Susumu Saruta ,  Hiroshi Tamura

IPC分类号： G10K11/178 ,  G10K11/16

CPC分类号： G10K11/1784 ,  G10K2210/1054 ,  G10K2210/3033 ,  G10K2210/30391 ,  G10K2210/3045

摘要： An adaptive type active noise cancellation apparatus comprises a first sensor for detecting a noise generated by a noise source and outputting a detection signal, a filter having a predetermined filter coefficient and filtering the output signal from the first sensor by using the predetermined filter coefficient and outputting a filtered signal, a speaker for receiving the filtered signal and generating a sound corresponding to the filtered signal, an active noise cancellation control system for actively canceling a noise at a control target point by using the sound generated by the speaker, a second sensor, arranged at the control target point, for detecting a sound at the control target point and outputting a detection signal, and an adaptive control system for receiving the output signals from the first and second sensors and adaptively updating the filter coefficient in accordance with a change in state of a system to which the active noise cancellation control system is applied. The adaptive control system includes a switch for stopping the active noise cancellation control system in adaptive processing, and a correction system for correcting the output signal from the first sensor or the second sensor by using a transfer function corresponding to a delay in a spatial system between the speaker and the second sensor and a delay required for calculation processing.