Title:
SOUNDPROOFING STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2019/059046
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a soundproofing structure with which it is possible to obtain high soundproofing performance and to suitably maintain formation properties. Provided is a soundproofing structure comprising a micro-perforated sheet having a plurality of through-holes that pass through in the thickness direction, wherein: in a main surface of the micro-perforated sheet, the average opening diameter of the through-holes is at least 0.1 μm and less than 100 μm; at least some of the plurality of through-holes are through-holes A shaped so as to have the greatest pore diameter in the interior thereof; and in the through-holes A, 1 <φ2/φ1 ≤ 5, where φ1 is the smallest pore diameter and φ2 is the greatest pore diameter.
Inventors:
HAKUTA SHINYA (JP)
YAMAZOE SHOGO (JP)
OHTSU AKIHIKO (JP)
YAMAZOE SHOGO (JP)
OHTSU AKIHIKO (JP)
Application Number:
PCT/JP2018/033623
Publication Date:
March 28, 2019
Filing Date:
September 11, 2018
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G10K11/16; B32B3/24; B32B15/01; E01F8/00; E04B1/86
Domestic Patent References:
| WO2016060037A1 | 2016-04-21 | |||
| WO2014141867A1 | 2014-09-18 |
Foreign References:
| JP2008231369A | 2008-10-02 | |||
| JP2008139816A | 2008-06-19 | |||
| JPH0830277A | 1996-02-02 | |||
| JPS6314300U | 1988-01-29 | |||
| JP2008218197A | 2008-09-18 |
Other References:
See also references of EP 3690874A4
DAH-YOU MAA., THE JOURNAL OF ACOUSTIC SOCIETY OF AMERICA, vol. 104, 1998, pages 2861
R. P. DOOLEYR. SHAW: "Noise Perception in Electrophotography", J. APPL. PHOTOGR. ENG., vol. 5, no. 4, 1979, pages 190 - 196
DAH-YOU MAA., THE JOURNAL OF ACOUSTIC SOCIETY OF AMERICA, vol. 104, 1998, pages 2861
R. P. DOOLEYR. SHAW: "Noise Perception in Electrophotography", J. APPL. PHOTOGR. ENG., vol. 5, no. 4, 1979, pages 190 - 196
Attorney, Agent or Firm:
WATANABE Mochitoshi et al. (JP)
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