Location of an acoustic source

A device for processing audio signals, comprising:

• a processing circuit which is configured to implement a method for processing audio signals acquired by at least one microphone, with a view to locating at least one sound source in a space comprising at least one wall, wherein the method comprises:
• applying a time-frequency transform to the acquired signals,
• generating, on the basis of the acquired signals, a general velocity vector V′(f) expressed in the frequency d0 main, estimated from an expression of a velocity vector V(f) in which a reference component D(f) other than an omnidirectional component W(f) appears in a denominator of said expression, said expression being complex with a real part and an imaginary part, the general velocity vector V′(f) characterizing a composition between:
• a first acoustic path, direct between the source and the microphone, represented by a first vector U0, and
• at least a second acoustic path resulting from a reflection on the wall and represented by a second vector U1,
• the second path having, at the microphone, a first delay TAU1 relative to the direct path,
• determining, as a function of the delay TAU1, the first vector U0, and the second vector U1, at least one parameter among:
• a direction of the direct path,
• a distance d0 from the source to the microphone,
• a distance z0 from the source to said wall.

A non-transitory computer readable storage medium storing instructions of a computer program causing implementation of a method for processing audio signals acquired by at least one microphone, with a view to locating at least one sound source in a space comprising at least one wall, when said instructions are executed by a processor of a processing circuit, wherein the method comprises:

• applying a time-frequency transform to the acquired signals,
• generating, on the basis of the acquired signals, a general velocity vector V′(f) expressed in the frequency domain, estimated from an expression of a velocity vector V(f) in which a reference component D(f) other than an omnidirectional component W(f) appears in a denominator of said expression, said expression being complex with a real part and an imaginary part, the general velocity vector V′(f) characterizing a composition between:
• a first acoustic path, direct between the source and the microphone, represented by a first vector U0, and
• at least a second acoustic path resulting from a reflection on the wall and represented by a second vector U1,
• the second path having, at the microphone, a first delay TAU1 relative to the direct path,
• determining, as a function of the delay TAU1, the first vector U0, and the second vector U1, at least one parameter among:
• a direction of the direct path,
• a distance d0 from the source to the microphone,
• a distance z0 from the source to said wall.