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Title:
SOUND-BLOCKING SHEET MEMBER, SOUND-BLOCKING STRUCTURE USING SAME, AND METHOD FOR MANUFACTURING SOUND-BLOCKING SHEET MEMBER
Document Type and Number:
WIPO Patent Application WO/2020/050358
Kind Code:
A1
Abstract:
The objective of the present invention is to provide a sound-blocking sheet member that has high sound-blocking performance exceeding the law of mass while being relatively lightweight, and has excellent manufacturability and durability. The sheet member has at least a sheet and a plurality of resonant parts. The resonant parts are provided in contact with a sheet surface of the sheet, and the resonant parts are provided with a weight section and a base section. The weight section is supported by the base section and has greater mass than the base section, and the weight section has a through portion. The base section makes contact with the surface of the weight section which is on the tip-end side of the resonant part, and covers the weight section.

Inventors:
SUGIURA KATSUHIKO (JP)
KOGA SHOGO (JP)
UCHIDA NAOYUKI (JP)
INOUE KAZUMA (JP)
KATO YUKIO (JP)
UEHARA KOHJI (JP)
MIURA MASASHI (JP)
Application Number:
PCT/JP2019/034966
Publication Date:
March 12, 2020
Filing Date:
September 05, 2019
Export Citation:
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Assignee:
MITSUBISHI CHEM CORP (JP)
International Classes:
G10K11/16; B32B3/24; B32B25/04; E04B1/82; G10K11/162; G10K11/172
Domestic Patent References:
WO2017135409A12017-08-10
WO2010080794A22010-07-15
Foreign References:
JP2000265593A2000-09-26
JPH10331285A1998-12-15
JP2018166867A2018-11-01
JP2019148471A2019-09-05
JP2000265593A2000-09-26
Other References:
MB ASSOUARM. SENESIM. OUDICHM. RUZZENEZ. HOU: "Broadband plate-type acoustic metamaterial for low-frequency sound attenuation", APPLIED PHYSICS LETTERS, vol. 101, 2012, pages 173505, XP012165487, DOI: 10.1063/1.4764072
M. OUDICHB. DJAFARI-ROUHANIY. PENNECM. B. ASSOUARB. BONELLO: "Negative effective mass density of acoustic metamaterial plate decorated with low frequency resonant pillars", JOURNAL OF APPLIED PHYSICS, vol. 116, 2014, pages 184504, XP012191811, DOI: 10.1063/1.4901462
M. OUDICHY. LIM. B ASSOUARZ. HOU: "A sonic band gap based on the locally resonant phononic plates with stubs", NEW JOURNAL OF PHYSICS, vol. 12, 2010, pages 083049
See also references of EP 3848926A4
Attorney, Agent or Firm:
TAZAKI Akira et al. (JP)
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