Title:
【発明の名称】能動型騒音制御装置
Document Type and Number:
Japanese Patent JP2882170
Kind Code:
B2
Abstract:
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.
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| WO/2016/026889 | USE OF ACTIVE NOISE SYSTEM |
Inventors:
KINOSHITA AKIO
DOI MITSUHIRO
MURAOKA KENICHIRO
HAMABE TSUTOMU
DOI MITSUHIRO
MURAOKA KENICHIRO
HAMABE TSUTOMU
Application Number:
JP6401392A
Publication Date:
April 12, 1999
Filing Date:
March 19, 1992
Export Citation:
Assignee:
NITSUSAN JIDOSHA KK
International Classes:
F01N1/06; G10K11/178; H03H21/00; H04B3/04; (IPC1-7): G10K11/178; F01N1/06; H03H21/00
Domestic Patent References:
| JP4267298A | ||||
| JP3259722A | ||||
| JP3204579A | ||||
| JP3203492A | ||||
| JP1501344A |
Attorney, Agent or Firm:
Tetsuya Mori (2 others)