Title:
SOUND ABSORPTION MEMBER
Document Type and Number:
WIPO Patent Application WO/2024/043174
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a sound absorption member that is based on new diffraction principles rather than conventional linear principles and that has a reduced thickness between a front surface portion and a back surface portion. This sound absorption member (1) includes: a front surface portion (2) on a sound source side having an X-Y plane; and a rear surface portion (4) disposed on the front surface portion (2) with a back air layer (3) therebetween having a thickness in a Z-direction. In the front surface portion (2), a plurality of slits (5) communicating with the back air layer (3) are provided at a prescribed length and a prescribed pitch, and ventilation chambers (6) for guiding and accommodating diffracted waves of incoming sound from the slits (5) are provided on the X-Y plane, with a prescribed thickness in the Z-direction.
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Inventors:
YAMAMOTO YOSHIKIYO (JP)
MIYASATO FUKUJI (JP)
MIZUGUCHI SATOSHI (JP)
MIYASATO FUKUJI (JP)
MIZUGUCHI SATOSHI (JP)
Application Number:
PCT/JP2023/029769
Publication Date:
February 29, 2024
Filing Date:
August 17, 2023
Export Citation:
Assignee:
YAMAMOTO COMPANY LTD (JP)
International Classes:
G10K11/16; E04B1/86; G10K11/162
Foreign References:
| JPS54107125A | 1979-08-22 | |||
| JP2013140248A | 2013-07-18 | |||
| KR101907975B1 | 2018-10-15 | |||
| JP2014514502A | 2014-06-19 | |||
| KR20150005200A | 2015-01-14 |
Attorney, Agent or Firm:
YOKOI Hiromichi et al. (JP)
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