EP 2540926 B1 20131127 - Acoustic dampening element and method for manufacturing the same
Title (en)
Acoustic dampening element and method for manufacturing the same
Title (de)
Schallabsorbierendes Element und Verfahren zur Herstellung desselben
Title (fr)
Elément absorbant acoustique et son procédé de fabrication
Publication
Application
Priority
EP 11172426 A 20110701
Abstract (en)
[origin: EP2540926A1] The flat sound-absorbing element has a plate (10) in which several holes spaced apart which are arranged as micro-slits (20). Each micro-slot is formed in an elongated shape. Each micro-slot is provided with slanted side walls (21) in the shape of truncated cone over the thick portion, by which the lower smaller hole opening (22) is connected to the upper wider opening (25). The lower smaller hole opening comprises a width of 0.05 to 0.15 mm, and a length of 10 to 60 millimeters. An independent claim is included for method for manufacturing flat sound-absorbing element.
IPC 8 full level
CPC (source: EP)
E04B 1/86 (2013.01); E04B 2001/8495 (2013.01)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2540926 A1 20130102; EP 2540926 A8 20130327; EP 2540926 B1 20131127
DOCDB simple family (application)
EP 11172426 A 20110701