EP 1662480 A4 20130123 - SOUND ABSORBING STRUCTURE AND METHOD OF PRODUCING THE SAME
Title (en)
SOUND ABSORBING STRUCTURE AND METHOD OF PRODUCING THE SAME
Title (de)
SCHALLABSORBTIONSSTRUKTUR UND VERFAHREN ZU IHRER HERSTELLUNG
Title (fr)
STRUCTURE D'ABSORPTION PHONIQUE ET PROCEDE DE PRODUCTION CORRESPONDANT
Publication
Application
Priority
- JP 2004012564 W 20040831
- JP 2003313869 A 20030905
Abstract (en)
[origin: EP1662480A1] A peak frequency having a high sound absorption coefficient is enlarged. A sound absorbing structure body comprises a concave-convex plate (2), a closure plate (1), and first and second partition plates (11) and (12). The concave-convex plate (2) includes a convex portion (3) and a concave portion (4) (concave-convex portion) and an opening (5). The closure plate (1) is bonded to the concave-convex plate (2) so as to form a hollow portion (6) by closing one of the convex portion (3) and the concave portion (4), and the hollow portion (6) is communicated with an outside space through the opening (5). The first and second partition plates (11) and (12) have a number of through holes (11a) and (12a) respectively, and the first and second partition plates (11) and (12) partition the hollow portion (6) into at least two partitioned spaces.
IPC 8 full level
G10K 11/172 (2006.01)
CPC (source: EP KR US)
G10K 11/00 (2013.01 - KR); G10K 11/172 (2013.01 - EP KR US)
Citation (search report)
- [XAI] US 6114652 A 20000905 - CLARKE JAMES A [US], et al
- [XAI] US 3866001 A 19750211 - KLEINSCHMIDT KLAUS, et al
- [A] JP H08301024 A 19961119 - TOYODA GOSEI KK
- [A] DE 4035177 A1 19920514 - DIEDRICHS HELMUT W [DE]
- [A] GB 827042 A 19600203 - GOMMA ANTIVIBRANTI APPLIC
- [A] US 3819007 A 19740625 - WIRT L, et al
- See references of WO 2005024778A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1662480 A1 20060531; EP 1662480 A4 20130123; CN 1846251 A 20061011; KR 100787297 B1 20071220; KR 20060034310 A 20060421; US 2006289229 A1 20061228; WO 2005024778 A1 20050317
DOCDB simple family (application)
EP 04772520 A 20040831; CN 200480025501 A 20040831; JP 2004012564 W 20040831; KR 20067004401 A 20060303; US 56913506 A 20060222