Title:
多孔吸音板
Document Type and Number:
Japanese Patent JP6602915
Kind Code:
B2
Abstract:
A perforated sound-absorbing plate includes a perforated plate as a base material in which a large number of through holes are formed. A coating film is provided on an inner wall surface of the through hole, and a through-hole portion whose volume is smaller than a volume of the through hole is formed by the coating film.
Inventors:
Zenzo Yamaguchi
Juichi Yamagiwa
Juichi Yamagiwa
Application Number:
JP2018096299A
Publication Date:
November 06, 2019
Filing Date:
May 18, 2018
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
G10K11/16; E01F8/00
Domestic Patent References:
| JP2008544119A | ||||
| JP200525137A |
Foreign References:
| US6206136 | ||||
| EP0552400A1 |
Attorney, Agent or Firm:
Kaji/Suhara Patent Office