Localization of an acoustic source

A device for processing sound signals, comprising:

• a processing circuit configured to implement a method for processing sound signals acquired by at least one microphone, for localizing at least one sound source in a space comprising at least one wall, by:
• applying a time-frequency transform to the acquired signals;
• and
• producing from the acquired signals, a velocity vector V(f), which is complex with a real part and an imaginary part and is expressed in the frequency domain, said velocity vector characterizes a composition between:
• a first acoustic path, direct between the at least one sound source and the at least one microphone, represented by a first vector U0, and
• at least one second acoustic path resulting from a reflection on the at least one wall and represented by a second vector U1,
• said second path having, at the at least one microphone, a first delay TAU1, with respect to the direct path,
• depending on the delay TAU1, on the first vector U0 and on the second vector U1, determining at least one parameter from among:
• a direction of the direct path,
• a distance d0 from the at least one sound source to the at least one microphone,
• a distance z0 from the at least one sound source to said at least one wall.

A non-transitory computer readable medium, storing a computer program comprising instructions for implementing a method, when said instructions are executed by a processor of a processing circuit, for processing sound signals for localizing at least one sound source in a space comprising at least one wall, wherein the sound signals are acquired by at least one microphone, and the method comprises:

• applying a time-frequency transform to the acquired signals;
• and
• producing from the acquired signals, a velocity vector V(f), which is complex with a real part and an imaginary part and is expressed in the frequency domain, said velocity vector characterizes a composition between:
• a first acoustic path, direct between the at least one sound source and the at least one microphone, represented by a first vector U0, and
• at least one second acoustic path resulting from a reflection on the at least one wall and represented by a second vector U1,
• said second path having, at the at least one microphone, a first delay TAU1, with respect to the direct path,
• depending on the delay TAU1, on the first vector U0 and on the second vector U1, determining at least one parameter from among:
• a direction of the direct path,
• a distance d0 from the at least one sound source to the at least one microphone,
• a distance z0 from the at least one sound source to said at least one wall.