EP 2629289 B1 20220615 - Feedback active noise control system with a long secondary path
Title (en)
Feedback active noise control system with a long secondary path
Title (de)
System zur aktiven Geräuschkontrolle mit Rückkopplung und einem langen zweiten Pfad
Title (fr)
Système de contrôle actif de bruit avec rétroaction et une voie secondaire longue
Publication
Application
Priority
EP 12155561 A 20120215
Abstract (en)
[origin: EP2629289A1] A feedback ANC system is disclosed that comprises a microphone (1) and a loudspeaker (2) arranged in a distance from each other; the microphone being acoustically coupled to the loudspeaker via a secondary path (3) and the loudspeaker being electrically coupled to the microphone via an ANC filter (6). The distance between the microphone and the loudspeaker is larger than a value that is determined by the speed of sound divided by 20 times an upper critical frequency of the ANC system.
IPC 8 full level
G10K 11/178 (2006.01)
CPC (source: EP US)
G10K 11/17817 (2017.12 - EP US); G10K 11/17854 (2017.12 - EP US); G10K 11/17857 (2017.12 - EP US); G10K 11/17875 (2017.12 - EP US); G10K 2210/108 (2013.01 - EP); G10K 2210/1282 (2013.01 - EP); G10K 2210/3011 (2013.01 - EP); G10K 2210/3026 (2013.01 - EP)
Citation (examination)
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)
DOCDB simple family (application)
EP 12155561 A 20120215