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Document Type and Number:
WIPO Patent Application WO/2019/009338
Kind Code:
Provided is a highly versatile sound-damping system with which it is possible to combine high ventilation performance and sound-proofing performance, dampen a plurality of resonant sounds, and which does not require design to be made to correspond to a tubular member. The sound-damping system has a sound-damping device provided to a tubular member, and the sound-damping device damps sound of a first resonant frequency of the tubular member. The sound-damping device has a cavity portion and an opening portion. The opening portion is connected to a sound stage space having the first resonance of the tubular member, and a converting mechanism which converts sound energy into heat energy is positioned at a position inside the cavity portion or covering the opening. If the area of the opening of the sound-damping device is defined as S1 and the surface area of the inner wall of the cavity portion is defined as Sd, the ratio S1/Sd of surface area S1 to surface area Sd satisfies the condition 0

SUGAWARA Yoshihiro (577 Ushijima, Kaisei-machi, Ashigara-kami-gu, Kanagawa 77, 〒2588577, JP)
YAMAZOE Shogo (577 Ushijima, Kaisei-machi, Ashigara-kami-gu, Kanagawa 77, 〒2588577, JP)
HAKUTA Shinya (577 Ushijima, Kaisei-machi, Ashigara-kami-gu, Kanagawa 77, 〒2588577, JP)
OHTSU Akihiko (577 Ushijima, Kaisei-machi, Ashigara-kami-gu, Kanagawa 77, 〒2588577, JP)
Application Number:
Publication Date:
January 10, 2019
Filing Date:
July 04, 2018
Export Citation:
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FUJIFILM CORPORATION (26-30, Nishiazabu 2-chome Minato-k, Tokyo 20, 〒1068620, JP)
International Classes:
G10K11/16; F24F13/24
Foreign References:
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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