EP 0086184 A3 19840502 - SOUND DAMPING DEVICE
Title (en)
SOUND DAMPING DEVICE
Publication
Application
Priority
SE 8200624 A 19820203
Abstract (en)
[origin: EP0086184A2] A sound-damping acoustic device comprises a sheet-material member (14) which can be set, by sound, into oscillatory motion transversely to its geometrical extension, and which forms at least a part of the defining walls of a chamber (16). The member (14) is substantially free-swinging, and the chamber (16) is at least substantially acoustically closed. The device also comprises means for damping displacement of the member transversely to said geometrical extension in proportion to changes in the rate of displacement.
IPC 1-7
IPC 8 full level
E04B 1/82 (2006.01); E04B 1/99 (2006.01); G10K 11/16 (2006.01); G10K 11/172 (2006.01)
CPC (source: EP)
G10K 11/172 (2013.01)
Citation (search report)
- [X] FR 1198880 A 19591210 - CHAUSSON USINES SA
- [Y] FR 2300384 A1 19760903 - LOCKHEED AIRCRAFT CORP [US]
- [Y] FR 2301064 A1 19760910 - ROLLS ROYCE [GB]
- [XP] EP 0046559 A2 19820303 - HOECHST AG [DE]
- [A] DE 732630 C 19430308 - LTG LUFTTECHNISCHE GMBH
- [A] GB 932521 A 19630731 - FERRANTI LTD
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0086184 A2 19830817; EP 0086184 A3 19840502; AU 1223383 A 19830825; CA 1198375 A 19851224; DK 435883 A 19830923; DK 435883 D0 19830923; FI 840850 A0 19840302; FI 840850 A 19840302; JP S59500116 A 19840119; NO 833509 L 19830928; SE 8200624 L 19830804; WO 8302793 A1 19830818; ZA 83591 B 19831130
DOCDB simple family (application)
EP 83850021 A 19830128; AU 1223383 A 19830128; CA 420794 A 19830202; DK 435883 A 19830923; FI 840850 A 19840302; JP 50069583 A 19830128; NO 833509 A 19830928; SE 8200624 A 19820203; SE 8300031 W 19830128; ZA 83591 A 19830128