EP 0046559 B1 19850626 - RESONANT SOUND-ABSORBING ELEMENT
Title (en)
RESONANT SOUND-ABSORBING ELEMENT
Publication
Application
Priority
DE 3032269 A 19800827
Abstract (en)
[origin: EP0046559A2] 1. Resonator-equipped acoustic absorption element, comprising a sound-absorbing material and an inherently stable casing surrounding this material, wherein the resonator-equipped acoustic absorption element includes a rigid hollow body which is open at one or two ends thereof and in the cavity of which at least one sound-absorbing planar resonator and/or at the front end of which a sound-absorbing planar resonator covering the aperture at the front end of the cavity is/are arranged, the material forming the planar resonator(s) being selected from a group consisting of a) perforated plastic films, b) films based on cellulose hydrate, which are at least approximately free from fibers and have an open-pore structure, and c) sheets comprising polymeric fibrids.
IPC 1-7
IPC 8 full level
G10K 11/16 (2006.01); G10K 11/172 (2006.01)
CPC (source: EP)
G10K 11/172 (2013.01)
Designated contracting state (EPC)
DE
DOCDB simple family (publication)
EP 0046559 A2 19820303; EP 0046559 A3 19821103; EP 0046559 B1 19850626; DE 3032269 A1 19820408; DE 3171122 D1 19850801
DOCDB simple family (application)
EP 81106377 A 19810817; DE 3032269 A 19800827; DE 3171122 T 19810817