EP 0539939 A1 19930505 - Active noise cancellation system.
Title (en)
Active noise cancellation system.
Title (de)
Aktives Lärmunterdrückungssystem.
Title (fr)
Système actif de suppression du bruit.
Publication
Application
Priority
FI 915142 A 19911031
Abstract (en)
The invention relates to an active noise cancellation system for a vehicle having a sound reproduction system, comprising means for generating one or more electrical signal(s) proportional to the noise in the target area, an electronic means (2) receiving these signals, such as an adaptive filter, for generating a noise cancellation signal, one or more sound sources (3) connected to said electronic means for generating cancellation noise in the target area, and one or more sensors (4) for detecting residual noise in the target area and transmitting it in an electrical form to the electronic means (2) to tune its operation. Specifically for simplification of the mounting of the system, the sound sources for generating cancellation noise are constituted by the loudspeakers (3) of the sound reproduction system of the vehicle, and the sensor or at least one of the sensors (4) for detecting residual noise has been fitted in conjunction with one of said loudspeakers (3). <IMAGE>
IPC 1-7
IPC 8 full level
B60R 11/02 (2006.01); F01N 1/00 (2006.01); G10K 11/178 (2006.01); H03H 21/00 (2006.01)
CPC (source: EP US)
G10K 11/17854 (2017.12 - EP US); G10K 11/17857 (2017.12 - EP US); G10K 11/17881 (2017.12 - EP US); G10K 2210/103 (2013.01 - EP); G10K 2210/1282 (2013.01 - EP); G10K 2210/3046 (2013.01 - EP); G10K 2210/3217 (2013.01 - EP); G10K 2210/3225 (2013.01 - EP)
Citation (search report)
- [Y] FR 2531023 A1 19840203 - PEUGEOT [FR]
- [A] US 3889058 A 19750610 - GABR SAAD ZAGHOUL MOHAMED
- [A] WO 8804621 A1 19880630 - SAAB SCANIA AB [SE]
- [Y] RESEARCH DISCLOSURE, no. 317, September 1990, page 784, Emsworth, GB; ANONYMOUSLY: "An active noise controller"
Designated contracting state (EPC)
BE DE FR GB IT NL SE
DOCDB simple family (publication)
EP 0539939 A1 19930505; EP 0539939 B1 19970423; DE 69219273 D1 19970528; DE 69219273 T2 19971120; FI 915142 A0 19911031; FI 915142 A 19930501; JP 2740091 B2 19980415; JP H07306683 A 19951121
DOCDB simple family (application)
EP 92118415 A 19921028; DE 69219273 T 19921028; FI 915142 A 19911031; JP 29280792 A 19921030