Patent ID: 11895478
Assignee: ORANGE
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. 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.