Title:
ACTIVE NOISE CONTROL DEVICE, PROGRAM, AND RANGE HOOD DEVICE
Document Type and Number:
WIPO Patent Application WO/2015/155922
Kind Code:
A1
Abstract:
Provided are an active noise control device, program, and range hood device with which it is possible to suppress the degradation of sound-deadening characteristics due to dip bandwidths of a transfer function occurring due to resonance in a space. A reference microphone (111) collects noise in a sound-deadening space (21b) in which sound deadening is to be performed. A speaker (113) receives a cancellation signal and outputs a cancellation sound for cancelling noise, the cancellation sound being outputted from a front surface to the sound-deadening space (21b). An error microphone (112) collects a synthetic sound formed by synthesizing the noise of the sound-deadening space (21b) and the cancellation sound. A signal processing device (127) outputs the cancellation signal. A first acoustic transmission unit (41) transmits the antiphase wave of the cancellation sound, which is outputted from a rear surface of the speaker (113), from a rear air chamber (310) to the sound-deadening space (21b).
Inventors:
HANAZONO MASAYA
YAMADA WAKIO
YAMADA WAKIO
Application Number:
PCT/JP2015/000983
Publication Date:
October 15, 2015
Filing Date:
February 26, 2015
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
F24F13/02; G10K11/178; G10K11/16
Foreign References:
| JPH08248964A | 1996-09-27 | |||
| JPH0819083A | 1996-01-19 |
Attorney, Agent or Firm:
NISHIKAWA, Yoshikiyo et al. (JP)
Yoshikiyo Nishikawa (JP)
Yoshikiyo Nishikawa (JP)
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