Acoustic control method and device for controlling the propagation of acoustic waves in the vicinity of a wall

Abstract

The present invention relates to an acoustic control method, comprising a step a) in which a number Nc of cells are affixed to the wall, each cell comprising a control unit, a power supply, an array of Nm microphones, and a loudspeaker, with each cell such that the loudspeaker is driven by the control unit using signals measured by the microphones; a step b) in which each microphone of each cell measures the acoustic pressure of the acoustic waves and the voltage across the loudspeaker of each cell; a step c) in which the control unit estimates the acoustic pressure and / or its tangential spatial derivatives at the loudspeaker, applies a control law, and from the voltage measurement and the estimation of the acoustic pressure and / or its tangential spatial derivatives, the intensity of the electrical signal is sent to the loudspeaker to determine a generalized acoustic impedance Zdet for the loudspeaker.a step d) in which a master device iteratively controls all the control units to adjust the generalized acoustic impedance Zdet for each cell. Abbreviated figure: Figure 2,