EP 0697149 A4 19951220 - ACTIVE CANCELLATION OF NOISE OR VIBRATIONS
Title (en)
ACTIVE CANCELLATION OF NOISE OR VIBRATIONS
Title (de)
AKTIVE GERÄUSCH- ODER VIBRATIONSUNTERDRÜCKUNG
Title (fr)
ELIMINATION ACTIVE DU BRUIT OU DE VIBRATIONS
Publication
Application
Priority
- US 9303354 W 19930409
- US 86691892 A 19920410
Abstract (en)
[origin: WO9321688A1] An active noise cancellation system processes a residual signal (r), generated by the interaction of a noise signal (p) and a cancelling signal (s), in the frequency domain so as to produce a new cancelling signal. A Fourier transformer (5, 8) operating in accordance with a moving discrete Fourier transform algorithm is used to produce a frequency domain representation of the residual signal.
IPC 1-7
IPC 8 full level
G10K 11/178 (2006.01)
CPC (source: EP US)
G10K 11/17825 (2017.12 - EP US); G10K 11/17853 (2017.12 - EP US); G10K 11/17883 (2017.12 - EP US); G10K 2210/129 (2013.01 - EP); G10K 2210/3025 (2013.01 - EP); G10K 2210/3045 (2013.01 - EP)
Citation (search report)
- No further relevant documents disclosed
- See references of WO 9321688A1
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
WO 9321688 A1 19931028; AU 3976493 A 19931118; CA 2117803 A1 19931028; EP 0697149 A1 19960221; EP 0697149 A4 19951220
DOCDB simple family (application)
US 9303354 W 19930409; AU 3976493 A 19930409; CA 2117803 A 19930409; EP 93909299 A 19930409