Patent ID: 7613305

Claim:
A method for processing an electric sound signal wherein a right sound signal and a left sound signal are diffused in a reflective environment by two speakers and are detected by an acoustic detector comprising a right microphone and a left microphone, the method comprising: computing a first temporal filter representing a first acoustic transformation applied to the right sound signal by the reflective environment between the right speaker and the right microphone; computing a second temporal filter representing a second acoustic transformation applied to the right sound signal by the reflective environment between the right speaker and the left microphone; computing a third temporal filter representing a third acoustic transformation applied to the left sound signal by the reflective environment between the left speaker and the left microphone; computing a fourth temporal filter representing a fourth acoustic transformation applied to the left sound signal by the reflective environment between the left speaker and the right microphone; modifying each of the temporal filters by an operation including at least one of: normalizing the temporal filters on a maximum of a direct field or on a quadratic average, temporal resetting of the temporal filters in relation to each other, providing a time lag of samples from a temporal filter, masking of at least some of the samples from the temporal filter, and altering an amplitude of at least some of the samples from a temporal filter; applying the modified temporal filters to a right original sound signal and a left original sound signal to obtain processed electric sound signals by: applying a first modified temporal filter to the right original electric sound signal to obtain a first processed electric sound signal, applying a second modified temporal filter to the right original electric sound signal to obtain a second processed electric sound signal, applying a third modified temporal filter to the left original sound signal to obtain a third processed electric sound signal, and applying a fourth modified temporal filter to the left original sound signal to obtain a fourth processed electric sound signal, adding the first and fourth processed electric sound signals and the right original sound signal to obtain a right processed electric sound signal; adding the second and third processed electric sound signals and the left original sound signal to obtain a left processed electric sound signal; and diffusing the right processed electric sound signal and the left processed sound signal.