pag_opacity_1.wav

Sound opacity (second example on sound transparency and opacity)

This sound sample is a companion to my talk and paper presented at FOTEO ("Faire oeuvre, transparence et opacité") at Université Laval, Visual Art Department, May 2008. The paper title is: "Transparence sonore : acoustique physique; opacité sonore : un phénomène psychoacoustique; implications en création sonore".

This example illustrates the "sound opacity" associated with psychoacoustic masking. A target (small tone) is presented with a mask (noise). Depending on the temporal position of the target in relation with the mask, the target is masked or not. In this example, the target is presented first, then closer to the mask, then with the mask, and finally after the mask. Masking, is what I presented as sound opacity in my talk.