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Patent Searching and Data


Title:
SOUNDPROOFING STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2019/203089
Kind Code:
A1
Abstract:
This soundproofing structure comprises an open member constituting an open pipe having a cross-sectional area S, and at least two resonant structures for sound waves, installed in the open pipe, wherein, when the cross-sectional area of the resonant structures is defined as Si, the width thereof as di, the spacing of the two resonant structures as L, the impedance of the two resonant structures as Zi, and the combined acoustic impedance thereof as Zc, the conditions in formula (1) are satisfied at a resonant frequency f0 at which a theoretical absorption value At is a maximum. This soundproofing structure can achieve high absorption using a plurality of resonant structures. (1) At(f0, L, S, Si, di, Zi)>0.75 Here, L>0, S>0, Si(i=1,2)> 0, di(i=1,2)>0

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WO/2009/041892SOUND-ABSORBING ARRANGEMENT
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Inventors:
OHTSU Akihiko (577 Ushijima, Kaisei-machi, Ashigara-kami-gu, Kanagawa 77, 〒2588577, JP)
SUGAWARA Yoshihiro (577 Ushijima, Kaisei-machi, Ashigara-kami-gu, Kanagawa 77, 〒2588577, JP)
HAKUTA Shinya (577 Ushijima, Kaisei-machi, Ashigara-kami-gu, Kanagawa 77, 〒2588577, JP)
YAMAZOE Shogo (577 Ushijima, Kaisei-machi, Ashigara-kami-gu, Kanagawa 77, 〒2588577, JP)
Application Number:
JP2019/015634
Publication Date:
October 24, 2019
Filing Date:
April 10, 2019
Export Citation:
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Assignee:
FUJIFILM CORPORATION (26-30, Nishiazabu 2-chome Minato-k, Tokyo 20, 〒1068620, JP)
International Classes:
G10K11/172; F24F13/02; F24F13/24; G10K11/16
Foreign References:
JP2016194682A2016-11-17
JPH10187162A1998-07-14
JP2017531143A2017-10-19
Attorney, Agent or Firm:
ITOH Hideaki et al. (XYMAX Iwamoto-cho Building 6F, 3-3 Iwamoto-cho 2-chome, Chiyoda-k, Tokyo 32, 〒1010032, JP)
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