EP 1557819 B1 20080109 - Sound absorbing structure
Title (en)
Sound absorbing structure
Title (de)
Schallabsorbierende Struktur
Title (fr)
Structure isolante acoustique
Publication
Application
Priority
DE 102004003507 A 20040116
Abstract (en)
[origin: EP1557819A1] The structure to absorb sound is composed of hollow structure units within an outer shell with free loose particles or a free hollow body. The particles or bodies can be fee or bonded together by an adhesive, solder or sintering within a matrix. The hollow structures have outer dimensions of 0.5-30 mm within a shell thickness of 10-3000 mu m with a shell of metal or a metal alloy, or a ceramic. The particles can be of carbide, nitride, oxide, silicide, with a preferred oxide of Al2O3, ZrO2, Y2O3, MgO or Fe2O3, Fe3O4, CoO, NiO, MoO3 and CuO.
IPC 8 full level
G10K 11/168 (2006.01); G10K 11/16 (2006.01); G10K 11/165 (2006.01)
CPC (source: EP)
G10K 11/16 (2013.01); G10K 11/165 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1557819 A1 20050727; EP 1557819 B1 20080109; AT E383639 T1 20080115; DE 102004003507 A1 20050811; DE 102004003507 B4 20060216; DE 502005002454 D1 20080221; ES 2299985 T3 20080601
DOCDB simple family (application)
EP 05400004 A 20050114; AT 05400004 T 20050114; DE 102004003507 A 20040116; DE 502005002454 T 20050114; ES 05400004 T 20050114