METHOD FOR THE ACTIVE ACOUSTIC CONTROL OF NARROW-BAND DISTURBING NOISE WITH ONE OR MORE MOBILE MICROPHONES, AND CORRESPONDING SYSTEM

摘要

The invention relates to a method for the active acoustic control of narrow-band disturbing noise with one or more mobile microphones, intended for the real-time attenuation, or even suppression, of the disturbing noise in a controlled zone (9) of a work space (1), by generation of at least one counter-noise by a sound generating means (3) controlled by a control signal U(t) produced at the output of a computing means receiving as input at least one measurement signal Y(t) originating from an acoustic sensor (6). The computing means uses a corrector (11) obtained on the basis of an acoustic model produced following a first prior identification step and a second prior corrector (11) synthesis step, with at least the corrector being stored in the computing means for use in real time in a third step for the real-time attenuation or suppression of the disturbing noise. According to the invention, the zone (9) to be controlled and the at least one acoustic sensor (6) may move over time inside the work space (1). In addition, identification points (8) (... Pj...) are previously determined in the work space (1). In the first step, the acoustic model is identified for each identification point (8). In the second step, the corresponding corrector (11) is synthesised for each model. In the third step, selection means (12) are employed in real time to select at least one of the stored correctors (11) for the production of the control signal U(t) in order at least to attenuate said disturbing noise.