EP 0828466 A4 19980318 -
Publication
Application
Priority
- US 9505721 W 19950509
- US 24042994 A 19940510
Abstract (en)
[origin: WO9530393A1] An active muffle noise cancellation system having an active controller (60), a speaker housing (41) with acoustic compliance spaces, a duct extension means (42, 43) in communication with said speaker housing and adapted to conform a dipole radiation pattern into a plane wave which can be measured by a microphone means (46).
IPC 1-7
IPC 8 full level
F01N 1/00 (2006.01); F01N 1/06 (2006.01); G10K 11/178 (2006.01); F01N 1/02 (2006.01)
CPC (source: EP US)
F01N 1/023 (2013.01 - EP US); F01N 1/065 (2013.01 - EP); G10K 11/17855 (2017.12 - EP US); G10K 11/17861 (2017.12 - EP US); G10K 11/17875 (2017.12 - EP US); G10K 2210/1053 (2013.01 - EP); G10K 2210/111 (2013.01 - EP); G10K 2210/112 (2013.01 - EP); G10K 2210/12822 (2013.01 - EP); G10K 2210/3026 (2013.01 - EP); G10K 2210/3216 (2013.01 - EP); G10K 2210/3219 (2013.01 - EP); G10K 2210/3224 (2013.01 - EP); G10K 2210/32272 (2013.01 - EP)
Citation (search report)
- [PXY] WO 9422403 A1 19941013 - NOISE CANCELLATION TECH [US]
- [DY] WO 9219080 A1 19921029 - NOISE CANCELLATION TECH [US]
- [DA] US 5097923 A 19920324 - ZIEGLER ELDON W [US], et al
- See references of WO 9530393A1
Designated contracting state (EPC)
AT BE DE ES FR GB IT NL SE
DOCDB simple family (publication)
WO 9530393 A1 19951116; CA 2188534 A1 19951116; CA 2188534 C 20000502; EP 0828466 A1 19980318; EP 0828466 A4 19980318; JP 3290991 B2 20020610; JP H09506188 A 19970617
DOCDB simple family (application)
US 9505721 W 19950509; CA 2188534 A 19950509; EP 95918421 A 19950509; JP 52915795 A 19950509