Title:
PUNCHED-HOLE THIN-FILM SOUND ABSORPTION CELL HAVING GUIDE PART
Document Type and Number:
Japanese Patent JP2015135359
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a punched-hole thin-film sound absorption cell having a guide part capable of previously blocking secondary noise occurring by a grazing flow and punched hole, even when the grazing flow exists above an upper surface plate.SOLUTION: The punched-hole thin-film sound absorption cell includes: a lower surface plate 10; side surface plates 20 having a certain height along an edge of the lower surface plate 10; an upper surface plate 30 having punched holes 35 that is fixed to the upper ends of the side surface plates 20; and fixed parts 40 along the upper surface edge of the upper surface plate 30. When a grazing flow exists above the upper surface plate 30, the upper surface plate 30 is extended downward in a streamline shape from one side of the punched hole 35 at which the grazing flow arrives later, and the grazing flow is guided to the other side of the punched hole 35 and passes the one side of the punched hole 35 without collision.
More Like This:
Inventors:
YI DONG-HOON
Application Number:
JP2014005688A
Publication Date:
July 27, 2015
Filing Date:
January 16, 2014
Export Citation:
Assignee:
SEOUL NAT UNIV OF TECHNOLOGY CT FOR INDUSTRY COLLABORATION
TAECHANG NIKKEI CO LTD
TAECHANG NIKKEI CO LTD
International Classes:
G10K11/16; E01F8/00; G10K11/172
Domestic Patent References:
| JP2012103556A | 2012-05-31 | |||
| JPS59154816U | 1984-10-17 | |||
| JP2012071662A | 2012-04-12 |
Attorney, Agent or Firm:
Tatsuro Yamamoto
Shoji Yamamoto
Shoji Yamamoto