Abstract: A method and associated system for estimating a quantity representative of the sound energy at at least one point of a three-dimensional space where a plurality of antennas are situated, each including at least K acoustic sensors, K being higher than or equal to 2, includes for each antenna of the plurality of antennas, production of a plurality of signals representative of the sound field at the antenna in question, for each antenna of the plurality of antennas, determination of a raw value of the quantity at the point based on at least K+1 elements of a matrix that are based respectively on pairwise combinations of representative signals produced by the antenna in question, and determination of an estimated value of the quantity at the point by combining the raw values of the quantity at the point determined respectively for the various antennas of the plurality of antennas.

Abstract: A conversion method comprises the following steps: for each of the signals (bE(t)) of a first set, determining values (?(f)) respectively associated with frequency bands; for each frequency band, converting the values (?(f)) associated with the relevant frequency band into at least one value representative of a virtual sound source oriented along the spatial direction associated with a data item stored for the relevant temporal frequency band; for each temporal frequency band, determining, on the basis of an above-mentioned representative value, a plurality of values (?(f)) associated with the different signals (bS(t)) of the second set, respectively; constructing each signal (bS(t)) of the second set on the basis of the values (?(f)) associated with this signal of the second set.

Abstract: Equipment (10) for reconstructing a recorded sound field includes a sensing arrangement (12) for measuring the sound field to obtain recorded data. A signal processing module (14) is in communication with the sensing arrangement (12) and processes the recorded data for the purposes of at least one of (a) estimating the sparsity of the recorded sound field and (b) obtaining plane-wave signals to enable the recorded sound field to be reconstructed.

Abstract: Equipment (10) for reconstructing a recorded sound field includes a sensing arrangement (12) for measuring the sound field to obtain recorded data. A signal processing module (14) is in communication with the sensing arrangement (12) and processes the recorded data for the purposes of at least one of (a) estimating the sparsity of the recorded sound field and (b) obtaining plane-wave signals to enable the recorded sound field to be reconstructed.