Title:
吸音装置
Document Type and Number:
Japanese Patent JP6887661
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To realize a sound absorption effect which is tuned for the sound frequency range corresponding to various environment in the life space(especially for office space), particularly to attain the sound absorption effect at low frequency range(about 400 to 800 Hz) at which appropriate sound absorption was not available.SOLUTION: The sound absorption device is constituted as the lamination in the order of a felt-like sound absorption plate 10 which is formed by pressing the fiber material, and a paper core material 20 which comprises many small cylindrical bodies 21, and a sound insulation material 30 (a). The paper core material 20 is located so that one aperture of the small cylindrical body 21 faces to the felt-like sound absorption plate 10 and the other aperture faces to the side of the reflection board 30 (b). In the small cylindrical body 21, a layer of the bulk material of fine porous powder (for example, comminution material of the block of phenolic sound absorption material) 23 is accommodated, or adding a layer of the porous resin block comprised of open cells (for example, phenolic sound absorption material) 22, if necessary with an air layer 24 with a certain thickness are laminated (c).SELECTED DRAWING: Figure 1
Inventors:
Takeshi Sakurai
Application Number:
JP2016223626A
Publication Date:
June 16, 2021
Filing Date:
November 16, 2016
Export Citation:
Assignee:
Tokyo Blind Industry Co., Ltd.
International Classes:
G10K11/16; B32B3/20; B32B5/26; B32B5/28; E04B1/86; G10K11/162
Domestic Patent References:
| JP2007062181A |
Attorney, Agent or Firm:
Kenichi Wakui
Norihiro Yamamoto
Kazunaga Suzuki
Takahiro Kudo
Naoto Mitsui
Norihiro Yamamoto
Kazunaga Suzuki
Takahiro Kudo
Naoto Mitsui