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Title:
SOUND INSULATION DEVICE FOR SOUNDPROOF WALL
Document Type and Number:
Japanese Patent JP2018044406
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a low-cost sound insulation device offering high sound insulation efficiency.SOLUTION: A sound insulation device A4 includes front and rear vertical wall plates 11, 12 that are fitted at a crown of a soundproof wall B and parallel to each other, an intermediate plate 14 between the front and rear wall plates, and a bottom plate 13 for closing an undersurface of the front, rear and intermediate plates. Since a sound insulation effect declines due to a resonance phenomenon in a space S surrounded by the front, rear and bottom plates, a reinforcing frame 17' and a side plate 15' having openings 17a, 15a are installed in a lengthwise direction of the space, for suppressing reflection of an incident sound. Reflection is suppressed also by providing a sound absorber 18 on an inner surface of the side plate 15' and others. The resonance phenomenon is suppressed by laying out a partition plate 17 that replaces the reinforcing frame 17' such that a distance between the partition plates and the side plates is not an integral multiple of half a wavelength of a frequency number when a sound reduction effect between the partition plates and the side plates declined. The configuration efficiently improves decline in the sound reduction effect due to the resonance phenomenon, and enables effective sound reduction. The reflection may also be suppressed by providing the sound absorber 18 on both side surfaces of the partition plate 17.SELECTED DRAWING: Figure 7

Inventors:
MATSUMOTO MASAYUKI
SHIKAKURA JUNJI
SUGIMURA SEIJI
YAMAMURO SHIGEKI
SHIMODA HIROSHI
Application Number:
JP2016181584A
Publication Date:
March 22, 2018
Filing Date:
September 16, 2016
Export Citation:
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Assignee:
KURIMOTO LTD
International Classes:
E01F8/00
Domestic Patent References:
JP2005163334A2005-06-23
JP2002038425A2002-02-06
JP2005163334A2005-06-23
JP2002038425A2002-02-06
JP2004060176A2004-02-26
JPH09151421A1997-06-10
JP2004060176A2004-02-26
JPH09151421A1997-06-10
Foreign References:
US20140291069A12014-10-02
US20140291069A12014-10-02
Attorney, Agent or Firm:
鎌田 直也
鎌田 文二
中谷 弥一郎
田川 孝由
清水 隆