EP 0888607 B1 20010613 - METHOD AND APPARATUS FOR THE ACTIVE CONTROL OF SOUND RADIATED FROM FLOW DUCTS
Title (en)
METHOD AND APPARATUS FOR THE ACTIVE CONTROL OF SOUND RADIATED FROM FLOW DUCTS
Title (de)
VERFAHREN UND VORRICHTUNG FÜR AKTIVE KONTROLLE VON,VON STRÖMUNGSLEITUNGEN AUSGESTRAHLTEN,GERAÜSCH
Title (fr)
PROCEDE DE REGULATION ACTIVE DES SONS SE PROPAGEANT A PARTIR DE CONDUITS D'ECOULEMENT ET APPAREIL CORRESPONDANT
Publication
Application
Priority
- GB 9700624 W 19970310
- GB 9605739 A 19960319
- GB 9618864 A 19960910
Abstract (en)
[origin: WO9735300A1] A method for the active control of sound radiated in a duct (1) comprising sensing sound from an array (4) of sensors located on the inside surface of a flow duct and controlling an array (3) of secondary sources (loudspeakers) so as to minimize sound radiated in the far field. This is done by controlling the sound sources so as to minimize a cost function. Depending on whether total sound power or sound power towards the sideline is to be reduced, different cost functions are used by the method.
IPC 1-7
IPC 8 full level
G10K 11/178 (2006.01)
CPC (source: EP US)
G10K 11/1781 (2017.12 - EP US); G10K 11/17857 (2017.12 - EP US); G10K 11/17875 (2017.12 - EP US); G10K 2210/111 (2013.01 - EP); G10K 2210/112 (2013.01 - EP); G10K 2210/119 (2013.01 - EP); G10K 2210/1281 (2013.01 - EP); G10K 2210/3051 (2013.01 - EP); G10K 2210/507 (2013.01 - EP)
Designated contracting state (EPC)
DE ES FR GB SE
DOCDB simple family (publication)
WO 9735300 A1 19970925; DE 69705211 D1 20010719; DE 69705211 T2 20011011; EP 0888607 A1 19990107; EP 0888607 B1 20010613; ES 2157557 T3 20010816
DOCDB simple family (application)
GB 9700624 W 19970310; DE 69705211 T 19970310; EP 97906266 A 19970310; ES 97906266 T 19970310