EP 2487677 B1 20200304 - COMPOUND SOUND ABSORPTION DEVICE WITH BUILT-IN RESONANT CAVITY
Title (en)
COMPOUND SOUND ABSORPTION DEVICE WITH BUILT-IN RESONANT CAVITY
Title (de)
VERBUNDSCHALLABSORPTIONSVORRICHTUNG MIT EINGEBAUTEM RESONANZHOHLRAUM
Title (fr)
DISPOSITIF COMPOSITE D'ABSORPTION DES SONS COMPRENANT UNE CAVITÉ RÉSONNANTE INCORPORÉE
Publication
Application
Priority
- CN 201010001223 A 20100108
- CN 2010001613 W 20101014
Abstract (en)
[origin: EP2487677A1] The composite sound-absorbing device of the present invention includes a perforated board having a number of first pores thereon, a back board and side boards, the perforated board, back board and side boards forming a closed cavity, wherein: at least one or more of the resonant cavities being located within the closed cavity; at least one or more of second pores being located on the resonant cavities; at least one of the second pores being connected with the closed cavity; the resonant cavity having a volume of V=10mm 3 -1×10 10 mm 3 , having a thickness of 0.05mm-10mm, the second pores having an aperture of d'=0.05-100mm, with a perforation rate Ã'=0.01%-30%. The present invention is beneficial to improve the effect of sound-absorbing and expand the frequency band of sound-absorbing.
IPC 8 full level
G10K 11/172 (2006.01); E04B 1/86 (2006.01)
CPC (source: EP)
E04B 1/86 (2013.01); G10K 11/172 (2013.01); E04B 2001/8428 (2013.01); E04B 2001/8452 (2013.01)
Citation (examination)
- US 4189027 A 19800219 - DEAN LEE W III [US], et al
- US 6098926 A 20000808 - MORGENTHALER DAVID R [US]
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2487677 A1 20120815; EP 2487677 A4 20160302; EP 2487677 B1 20200304; CN 101727894 A 20100609; CN 101727894 B 20120523; WO 2011082510 A1 20110714
DOCDB simple family (application)
EP 10841854 A 20101014; CN 2010001613 W 20101014; CN 201010001223 A 20100108