Title:
SOUND ATTENUATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2012/147908
Kind Code:
A1
Abstract:
Louver units (22, 35) configured by providing a series of acute angle parts (21, 34) at the end (10a) of a pair of reflecting surfaces (10) having an attenuation property are configured in an adjoining manner with a specific interval therebetween so that the reflecting surfaces (10) are arranged facing each other, wherein incident sound entering from outside is caused to ingress without omission in a repeating reflection lane (32) at an angle of incidence in a specific range to cause multiple attenuated reflections between the reflecting surfaces (10) arranged facing the sound incident upon the reflecting surfaces (10) to effect sound attenuation. For example, an angle of inclination α of an inclined reflecting surface with respect to a virtual flat surface joining the ends of the reflecting surfaces is set to be greater than π/4 and less than π/2.
Inventors:
KIDU RYOUTA (JP)
MICHIWAKI HIROSHI (JP)
MICHIWAKI HIROSHI (JP)
Application Number:
PCT/JP2012/061336
Publication Date:
November 01, 2012
Filing Date:
April 27, 2012
Export Citation:
Assignee:
IHI INFRASTRUCTURE SYS CO LTD (JP)
NEXT INNOVATION LLC (JP)
KIDU RYOUTA (JP)
MICHIWAKI HIROSHI (JP)
NEXT INNOVATION LLC (JP)
KIDU RYOUTA (JP)
MICHIWAKI HIROSHI (JP)
International Classes:
G10K11/16; E01F8/00; E04B1/86
Foreign References:
| JPH08177017A | 1996-07-09 | |||
| JPS54118201A | 1979-09-13 | |||
| JP2005308976A | 2005-11-04 |
Attorney, Agent or Firm:
KOIKE, Akira et al. (JP)
Akira Koike (JP)
Akira Koike (JP)
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Claims: