EP 1246162 A1 20021002 - Envelopes or walls presenting adjustable sound insulation and/or absorption properties
Title (en)
Envelopes or walls presenting adjustable sound insulation and/or absorption properties
Title (de)
Hülle oder Wände mit verstellbaren Schalldämmungs- und/oder Schallabsorptionseigenschaften
Title (fr)
Enveloppes ou parois presentant des propriétés ajustables d'isolement et/ou d'absorption accoustique
Publication
Application
Priority
EP 01870065 A 20010327
Abstract (en)
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.
Abstract (fr)
La présente invention se rapporte à un dispositif d'isolement et/ou de correction acoustique dans le domaine des ondes de fréquence audible, c'est-à-dire entre 15 Hz et 20 kHz, et de préférence comprises entre 100 et 5000 Hz, caractérisé en ce qu'il présente, au sein d'un milieu de base, une répétition périodique à deux dimensions d'une cellule de base, ladite cellule comprenant au moins un motif géométrique anguleux, ledit motif étant constitué d'au moins deux côtés, pour former une structure de matériaux juxtaposés présentant de forts contrastes d'impédances acoustiques, c'est-à-dire de densités et/ou de vitesses de propagation desdites ondes. <IMAGE>
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 (applicant)
- WO 8903472 A2 19890420 - MASCIOLI ALESSANDRO [IT]
- JP H0869286 A 19960312 - HITACHI LTD
- SU 1629576 A1 19910223 - BELGORODSKIJ EX LITEJNO MEKH Z [SU]
- US 4887692 A 19891219 - OUTANI HIROAKI [JP], et al
- JP H1193670 A 19990406 - HITACHI CONSTRUCTION MACHINERY
- JP S62277044 A 19871201 - TOSHIBA CORP
- JP H04173420 A 19920622 - NISSAN MOTOR
- JP H04173426 A 19920622 - NISSAN MOTOR
- JP H02267433 A 19901101 - BRIDGESTONE CORP, et al
- EP 0375549 A2 19900627 - SCHLUMBERGER LTD [US], et al
Citation (search report)
- [A] FR 2312831 A1 19761224 - BRIDGESTONE TIRE CO LTD [JP]
- [A] DE 3825626 A1 19890216 - KRUPP STAHL AG [DE]
- [A] DE 3707650 C1 19880609 - FRAUNHOFER GES FORSCHUNG
- [X] PATENT ABSTRACTS OF JAPAN vol. 015, no. 320 (P - 1238) 15 August 1991 (1991-08-15)
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