Title:
NOISE OBSERVATION DEVICE AND NOISE OBSERVATION METHOD
Document Type and Number:
WIPO Patent Application WO/2014/024382
Kind Code:
A1
Abstract:
A noise observation device comprises: a cross-correlation coefficient calculation unit (112) which, using four microphones (M0-M3) which are respectively positioned two-by-two upon the x-axis, the y-axis, and the z-axis, computes cross-correlation coefficients of sound which has reached each microphone (M0-M3) for each axis; a peak search processing unit (114) which extracts, in descending order of cross-correlation coefficient, a plurality of time lags which denote a peak trend for the cross-correlation coefficients; a segmentation processing unit (116) which collects fluctuations in a time region of the plurality of time lags and forms a set of time lags which is contiguous for each axis; a normalized cross-correlation coefficient calculation unit (122) which, for the set of time lags for each axis, computes normalized cross-correlations between different axes; and a segment integration processing unit (124) which combines sets of time lags with the same sound sources, from normalized cross-correlation coefficients.
Inventors:
SHINOHARA KENJI (JP)
SAKODA KEISHI (JP)
SAKODA KEISHI (JP)
Application Number:
PCT/JP2013/004343
Publication Date:
February 13, 2014
Filing Date:
July 16, 2013
Export Citation:
Assignee:
RION CO (JP)
International Classes:
G01H3/00
Foreign References:
| JPH0743203A | 1995-02-14 | |||
| JP2005184426A | 2005-07-07 | |||
| JPH023126A | 1990-01-08 | |||
| JPS59216022A | 1984-12-06 | |||
| JPH11190777A | 1999-07-13 |
Attorney, Agent or Firm:
YAMASAKI, TAKAHIRO (JP)
Takahiro Yamazaki (JP)
Takahiro Yamazaki (JP)
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