1. A method for sound source localization, comprising the steps of: receiving an aural signal; computing an envelope of said aural signal; performing a non-linear, onset preserving smoothing of said envelope to generate a smooth envelope signal; evaluating cues for sound source localization, using points where said smoothing changes from a rising phase of said envelope to a falling phase of said envelope as measurement points; and localizing said aural signal based upon said cues.