PERCEPTION DE LA COLORATION D'UN BRUIT BLANC DUE À UN ÉCHO LATÉRAL

Abstract
In this paper, the coloration, which is a modification of timbre, is more precisely defined. The classical results, concerning coloration of a white noise due to its echo, both with the same frontal direction, are presented. Given the importance of lateral echoes to the quality of room acoustics, we got interested in coloration with a lateral echo. From the first results, it seems that the coloration thresholds are much lower than those with a frontal echo. However, they appear to be the results of two cues : a spectral one (the coloration, we are interested in) and a spatial one. As we reduce step by step the latter one, the results with the lateral echo get closer and closer to the results with a frontal echo. Then, the perception of coloration does not seem to depend on the azimuth of the echo, and our first results were, in fact, based on a spatial cue.