Patent ID: 7171005

Claim:
A method of diffusing sound in a space in order to transmit in this space information in the form of acoustic waves representative of a signal X(t), by means of at least one acoustic enclosure having at least one input controlling a number n of loudspeakers, n being a natural integer greater than or equal to 1, this method comprising at least one step of sound diffusion during which an electrical signal P(t)=W(t) X(t) is applied to the input of the acoustic enclosure where: is the mathematical convolution product operator and W(t) represents a filter template previously determined and memorised, the said method comprising a training step during which the filter template is determined as follows: W ( t )= S (− t ) I ( t ), where S(−t) is the temporal return of the impulse response S(t) between the enclosure and a target zone of the space where sound is diffused, t representing the time, and I(t) is the temporal response of the product e −2inft0 .Sc(f), where f represents the frequency, t0 is a time shift coefficient and Sc(f)=1/(S1(f)) α , α being a non zero positive number and S1(f) being a real function obtained by clipping the module |S(f)| of the response in frequency S(f) of the impulse response S(t).