Title:
ACTIVE NOISE REDUCTION DEVICE, INSTRUMENT USING SAME, AND ACTIVE NOISE REDUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2014/115533
Kind Code:
A1
Abstract:
In order to solve this problem in an active noise reduction device, a control block determines the magnitude of the level of a reference signal sensed by a level detector. In the control block, the level of a cancel signal is reduced when the level of the reference signal is determined to be small. The occurrence of abnormal noises can thereby be suppressed even when the noise level is small.
Inventors:
TANI MITSUHIRO
KAITOU MITSURU
FUNAYAMA TOSHIYUKI
KAITOU MITSURU
FUNAYAMA TOSHIYUKI
Application Number:
PCT/JP2014/000269
Publication Date:
July 31, 2014
Filing Date:
January 21, 2014
Export Citation:
Assignee:
PANASONIC CORP (JP)
International Classes:
G10K11/178; B60R11/02
Foreign References:
JPH05216484A | 1993-08-27 | |||
JP2000267674A | 2000-09-29 | |||
JP2003027916A | 2003-01-29 | |||
JPH07261774A | 1995-10-13 | |||
JPH0728474A | 1995-01-31 |
Other References:
See also references of EP 2950305A4
Attorney, Agent or Firm:
TOKUDA, Yoshiaki et al. (JP)
Yoshiaki Tokuda (JP)
Yoshiaki Tokuda (JP)
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