Patent ID: 8059822

Claim:
A method for actively correcting the acoustic properties of a listening zone ( 27 ) of an acoustic space ( 1 ) including: a step of converting a signal to be reproduced in an acoustic space ( 1 ) producing a primary sound signal causing resonances in the acoustic space ( 1 ), the superimposition of the primary sound signal with the resonances forming a perturbed sound signal, a step of attenuating resonances comprising: a step of measuring the perturbed sound signal, said perturbed sound signal being converted into an electrical signal ( 32 ), a step of processing the electrical signal ( 32 ) forming a processed electrical signal ( 9 ), a step of converting by at least one secondary sound reproduction source ( 8 ) said processed electrical signal ( 9 ) into a secondary sound signal capable of attenuating said resonances to obtain a corrected sound signal, characterised in that: the step of measuring the perturbed sound signal includes several measuring positions ( 5 ) predetermined in the acoustic space ( 1 ) so as to measure resonance amplitudes close to those of the resonances perturbing the reproduction of the primary sound signal in the listening zone ( 27 ), the secondary sound signal attenuating the resonances is reproduced in several correcting positions ( 17 ) predetermined in the acoustic space ( 1 ) so as to act in reverse direction on said resonances enabling to obtain a homogeneous corrected sound signal in the listening zone ( 27 ), the step of attenuating the resonances is coupled with a step of processing the signal to be reproduced so as to enable the generation of a modified sound signal capable of minimising the formation of the resonances, the step of processing the electrical signal takes into account all the perturbed sound signals measured at the different measuring positions ( 5 ).