EP 2122607 A2 20091125 - METHOD FOR THE ACTIVE REDUCTION OF SOUND DISTURBANCE
Title (en)
METHOD FOR THE ACTIVE REDUCTION OF SOUND DISTURBANCE
Title (de)
VERFAHREN ZUR AKTIVEN MINDERUNG VON STÖRGERÄUSCHEN
Title (fr)
PROCEDE DE REDUCTION ACTIVE D'UNE NUISANCE SONORE
Publication
Application
Priority
- FR 2008050371 W 20080304
- FR 0701718 A 20070309
Abstract (en)
[origin: WO2008125774A2] The invention relates to a method and a system for the active reduction, at a predetermined area, of the energy of a sound signal (d<SUB>k</SUB>(n)), also called a diffused noise signal, generated at said area by a primary signal (x<SUB>k</SUB>(n)), or noise signal, by the emission of a plurality of counter-noise signals (y<SUB>k</SUB>(n)) having an effect antagonistic to the diffused noise signal (d<SUB>k</SUB>(n)), each of said counter-noise signals (y<SUB>k</SUB>(n)) including a feedback counter-noise signal (yfbk<SUB>k</SUB>(n)) and a feed-forward counter-noise signal (yfwd<SUB>k</SUB>(n)). The method of the invention comprises detecting the periodical components of diffused noise signal (d<SUB>k</SUB>(n)) for adjusting the feedback counter-noise signal (yfbk<SUB>k</SUB>(n)), and modelling the inverse of the secondary path for adjusting the feedback counter-noise (yfbk<SUB>k</SUB>(n)) and feed-forward counter-noise (yfwd<SUB>k</SUB>(n)) signals. The invention can be implemented to any type of industrial or non-industrial noise and in any location such as working places and relaxation places.
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 11/17855 (2017.12 - EP US); G10K 11/17881 (2017.12 - EP US)
Citation (search report)
See references of WO 2008125774A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
FR 2913521 A1 20080912; FR 2913521 B1 20090612; AT E495521 T1 20110115; DE 602008004461 D1 20110224; EP 2122607 A2 20091125; EP 2122607 B1 20110112; ES 2359783 T3 20110526; US 2010034398 A1 20100211; US 8401204 B2 20130319; WO 2008125774 A2 20081023; WO 2008125774 A3 20081231; WO 2008125774 A4 20090219
DOCDB simple family (application)
FR 0701718 A 20070309; AT 08775674 T 20080304; DE 602008004461 T 20080304; EP 08775674 A 20080304; ES 08775674 T 20080304; FR 2008050371 W 20080304; US 53050608 A 20080304