Patent ID: 8401204
Filing Date: 2013-03-19
Classification: G10K

Abstract:
1. Method for the active reduction in a determined zone ( 22 ) of the energy of a sound signal (d k (n)), called propagated noise signal, generated in said zone ( 22 ) by a primary signal (x k (n)), called noise signal, said method comprising a transmission, by transmission means, of at least one counter-noise signal (y k (n)) comprising at least one first so-called feedback counter-noise signal (yfbk k (n)), counteracting said propagated noise signal (d k (n)), said method also comprising at least one iteration of the following operations: measurement, by measurement means arranged in said determined zone ( modelling, by at least one first filter (Ŝ detection of at least one periodic component of said propagated noise signal (d adjustment of said feedback counter-noise signal (yfbk