EP 1697923 B1 20071212 - COMPONENT THAT ABSORBS AIRBORNE SOUND
Title (en)
COMPONENT THAT ABSORBS AIRBORNE SOUND
Title (de)
LUFTSCHALLABSORBIERENDES BAUTEIL
Title (fr)
COMPOSANT ABSORBANT LES BRUITS AERIENS
Publication
Application
Priority
- EP 2004011899 W 20041021
- DE 20320100 U 20031223
Abstract (en)
[origin: US2006169531A1] The invention relates to an airborne-sound absorbing component, in particular for motor vehicles, comprising a resonance absorber ( 1 ) with a plurality of differently sized hollow chambers ( 2 ) spaced apart from each other, and comprising a porous sound-absorbing layer ( 8 ) made of an air-permeable material, which layer faces the incoming sound, wherein in each instance the hollow chambers comprise a wall section ( 5 ) which faces the incoming sound. The wall sections ( 5 ), which face the incoming sound and which are able to oscillate, are closed off so as to be airtight, wherein the resonance absorber ( 1 ) comprises one or several spacers ( 10 ) such that at least the majority of the wall sections ( 5 ) of the hollow chambers ( 2 ), which wall sections face the incoming sound, do not establish contact with the porous layer ( 8 ) and are able to oscillate independently of said porous layer ( 8 ). As a result of these features improved sound absorption capability across a broad frequency range is achieved.
IPC 8 full level
G10K 11/16 (2006.01); G10K 11/172 (2006.01)
CPC (source: EP US)
G10K 11/172 (2013.01 - EP US)
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)
US 2006169531 A1 20060803; AT E381087 T1 20071215; BR PI0406616 A 20051206; CN 1820304 A 20060816; DE 20320100 U1 20050512; DE 502004005732 D1 20080124; EP 1697923 A1 20060906; EP 1697923 B1 20071212; ES 2297503 T3 20080501; JP 2007515340 A 20070614; MX PA05011254 A 20051214; PL 1697923 T3 20080530; PT 1697923 E 20080225; WO 2005066932 A1 20050721
DOCDB simple family (application)
US 54008005 A 20050622; AT 04790706 T 20041021; BR PI0406616 A 20041021; CN 200480001126 A 20041021; DE 20320100 U 20031223; DE 502004005732 T 20041021; EP 04790706 A 20041021; EP 2004011899 W 20041021; ES 04790706 T 20041021; JP 2006545933 A 20041021; MX PA05011254 A 20041021; PL 04790706 T 20041021; PT 04790706 T 20041021