EP 1374220 A1 20040102 - WALLS OR PARTITIONS HAVING ADJUSTABLE ACOUSTIC ABSORPTION AND/OR INSULATION PROPERTIES
Title (en)
WALLS OR PARTITIONS HAVING ADJUSTABLE ACOUSTIC ABSORPTION AND/OR INSULATION PROPERTIES
Title (de)
HÜLLE ODER WÄNDE MIT VERÄNDERBAREN SCHALLDÄMMUNGS- UND/ODER SCHALLABSORPTIONSEIGENSCHAFTEN
Title (fr)
ENVELOPPES OU PAROIS PRESENTANT DES PROPRIETES AJUSTABLES D'ISOLEMENT ET/OU D'ABSORPTION ACOUSTIQUE
Publication
Application
Priority
- EP 02719573 A 20020325
- BE 0200044 W 20020325
- EP 01870065 A 20010327
Abstract (en)
[origin: EP1246162A1] Acoustic insulating container or partition which consists of a basic low-density medium, e.g. a gas such as air, hydrogen or nitrogen, containing a periodic repetition in two dimensions of a base cell with at least one angular geometric motif. <??>Acoustic insulating container or partition which consists of a basic low-density medium, e.g. a gas such as air, hydrogen or nitrogen, containing a periodic repetition in two dimensions of a base cell with at least one angular geometric motif. The motif has at least two sides forming a structure of juxtaposed materials with strongly contrasting acoustic impedances, i.e. densities and/or wave propagation velocities. The angular motifs can have a right-angled cross-section with sides of the same or different lengths, a cross-section in the shape of an H, I, U or C, or solid or hollow tubes or bars, and the spaces between the motifs can be wholly or partly filled with a preferably porous acoustically absorbent material that replaces the basic medium. The motifs are of high density, made from metals or alloys such as iron, steel, aluminum, mercury and lead, or glass, concrete, plaster, ceramic, minerals, polymers or wood, or from tubes filled with a liquid such as water, oil or a gel.
IPC 1-7
IPC 8 full level
G10K 11/16 (2006.01); G10K 11/175 (2006.01)
CPC (source: EP)
G10K 11/16 (2013.01)
Citation (search report)
See references of WO 02077968A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1246162 A1 20021002; EP 1374220 A1 20040102; WO 02077968 A1 20021003
DOCDB simple family (application)
EP 01870065 A 20010327; BE 0200044 W 20020325; EP 02719573 A 20020325