Centre National De La Recherche Scientifique

Université´ D'aix-marseille

Ecole Centrale De Marseille

Philippe Martin Herzog

Sergio Bellizzi

Pierre-Olivier Mattei

Marc Pachebat

Bruno Cochelin

Renaud Cote

Cedric Pinhede

An attenuation device for attenuating sound waves, and a corresponding system and method, generated by a source emitting sound waves having frequencies between f1 and f2 and wherein the pressure levels are between n1 and n2. The attenuation device comprising at least one acoustic absorber comprising at least one non-linear membrane; the attenuation device being configured in such a way that the first face of the absorber is in acoustic communication with the source. The attenuation device also comprises at least one coupling element for coupling the second face with the source, the coupling element being configured to transmit to the second face sound waves according to the sound waves emitted by the source, and of which the phase and/or the amplitude leads to a pressure differential of the sound waves arriving respectively on the first and second face at the same time.

Sound attenuation device and method

The invention concerns a method and device for actively correcting acoustic properties of a listening zone () of an acoustic space (), comprising means for converting a signal to be reproduced () in an acoustic space (), means for attenuating resonance including at least means for measuring the perturbed sound signal (), means for processing an electric signal () and at least one secondary sound reproduction source (). The invention is characterized in that the means for measuring the perturbed sound signal () are distributed in several predetermined measuring positions () in the acoustic space (), the secondary sound reproduction sources () are distributed in several predetermined correcting positions () in the acoustic space (), the resonance attenuating means is coupled with means for processing the signal to be reproduced () and the electric signal processing means () includes at least one signal controlling means () connected to each means for measuring the perturbed sound signal ().

Method and device for actively correcting the acoustic properties of an acoustic space listening zone

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Roquevaire, France

Philippe Martin Herzog