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Title:
ACTIVE NOISE CONTROL SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/103017
Kind Code:
A1
Abstract:
This active noise control system (500) is provided with at least one noise cancelling speaker for emitting sound waves for cancelling sound. At least one noise cancelling speaker includes a piezoelectric speaker (10). The piezoelectric speaker (10) is provided with a piezoelectric film (35), a fixing surface (17) which contacts a support body that supports the piezoelectric speaker (35), and a film holding unit (55) which is arranged between the piezoelectric film (35) and the fixing surface (17). (i) The film holding unit (55) includes an adhesive layer and the fixing surface (17) is formed from the surface of the adhesive layer, and/or (ii) the film holding unit (55) includes a porous layer.

Inventors:
KOMOTO Yusuke (1-2 Shimohozumi 1-chome, Ibaraki-sh, Osaka 80, 〒5678680, JP)
HISHIKI Tomoaki (1-2 Shimohozumi 1-chome, Ibaraki-sh, Osaka 80, 〒5678680, JP)
OTO Kohei (1-2 Shimohozumi 1-chome, Ibaraki-sh, Osaka 80, 〒5678680, JP)
YAMAMOTO Saori (1-2 Shimohozumi 1-chome, Ibaraki-sh, Osaka 80, 〒5678680, JP)
SEKIGUCHI Yuka (1-2 Shimohozumi 1-chome, Ibaraki-sh, Osaka 80, 〒5678680, JP)
Application Number:
JP2018/042909
Publication Date:
May 31, 2019
Filing Date:
November 20, 2018
Export Citation:
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Assignee:
NITTO DENKO CORPORATION (1-2 Shimohozumi 1-chome, Ibaraki-shi Osaka, 80, 〒5678680, JP)
International Classes:
G10K11/178; E04B1/82; H04R17/00
Foreign References:
JPS6381599U1988-05-28
JP2015135443A2015-07-27
JPH08265897A1996-10-11
JP2010226405A2010-10-07
Attorney, Agent or Firm:
KAMADA Koichi (8th Fl, UMEDA PLAZA BLDG. ANNEX 4-3-25, Nishitenma, Kita-ku, Osaka-sh, Osaka 47, 〒5300047, JP)
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