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Patent Searching and Data


Title:
SOUNDPROOF STRUCTURAL BODY
Document Type and Number:
WIPO Patent Application WO/2019/069903
Kind Code:
A1
Abstract:
This soundproof structural body has: a first pipe structure; and a second pipe structure that is connected to the first pipe structure and that has a different cross-sectional area size from the first pipe structure, wherein a structural body having a cross-sectional area smaller than that of the first pipe structure is installed inside the first pipe structure, and the transmission loss, obtained when the structural body is installed inside the first pipe structure as compared to when the structural body is not installed inside the first pipe structure, is more unlikely to exhibit a columnar resonance mode and is positive at two adjacent frequencies. This soundproof structural body exhibits a soundproof effect even at a frequency other than that of columnar resonance of a pipe structure such as a duct or a muffler, is compact, and can provide a high transmission loss in a wide band.

Inventors:
OHTSU Akihiko (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)
SUGAWARA Yoshihiro (577 Ushijima, Kaisei-machi, Ashigara-kami-gu, Kanagawa 77, 〒2588577, JP)
Application Number:
JP2018/036837
Publication Date:
April 11, 2019
Filing Date:
October 02, 2018
Export Citation:
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Assignee:
FUJIFILM CORPORATION (26-30, Nishiazabu 2-chome Minato-k, Tokyo 20, 〒1068620, JP)
International Classes:
G10K11/16; F16L55/02; F24F13/24; G10K11/172
Foreign References:
JP2015072360A2015-04-16
Attorney, Agent or Firm:
WATANABE Mochitoshi et al. (XYMAX Iwamoto-cho Building 6F, 3-3 Iwamoto-cho 2-chome, Chiyoda-k, Tokyo 32, 〒1010032, JP)
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