Method and device for analysing a medium

A method for analyzing a medium based on a transducer array, wherein the method comprises the following phases:

• generating in a scattering medium, by transducers of the transducer array, a transmission wave having a desired transmission angle,
• receiving, by transducers of the transducer array, reverberated signals and their combinations to obtain reception signals representative of several reception waves reflected by the scattering medium at respective reception angles, each reception signal comprising:
• a single scattering component, representative of wave paths resulting from a single reflection of the transmission wave off a scatterer of the scattering medium,
• a multiple scattering component, representative of wave paths resulting from several successive reflections of the transmission wave off scatterers of the scattering medium before reaching the transducers of the transducer array,
• repeating the generating and receiving steps for a plurality of transmission waves, each having an associated transmission angle,
• processing the reception signals to determine features of the medium, the processing phase comprising a step of separating the single scattering component and the multiple scattering component in said reception signals, said separating step including the following sub-steps:
• determining at least one windowed inter-angle matrix in which each row is representative of the transmission angle of a plane transmission wave and each column is representative of the reception angle of a plane reception wave,
• filtering the at least one windowed inter-angle matrix to separate the single scattering component and the multiple scattering component in each reception signal.