Sound capture device with improved microphone array

A sound capture device, comprising at least:

• a plurality of microphone capsules, distributed over a portion P of a sphere S circumscribed between two or three planes perpendicular to each other, the three planes intersecting at a point corresponding to a center of the sphere S, and two of the aforementioned planes intersecting in a straight line passing through the center of the sphere S, and the sphere portion P being such that P=n S/8, with n=1,2;
• and
• a processing unit connected to the capsules to receive signals captured by the capsules, the processing unit being arranged to:
• matrix the signals in an ambisonic representation which retains only ambisonic components associated with spherical harmonics that are symmetrical in relation to at least two of the aforementioned planes, and
• process a matrix thus obtained in order to identify at least one sound source in a space surrounding the sphere portion, and to interpret a sound signal originating from this source.