EFFECTS OF TEMPORAL DISTRIBUTION OF SOUND ENERGY WITHIN MARKER DURATION ON THE PERCEPTION OF EMPTY TIME INTERVALS
The aim of this study was to examine whether and how the temporal distribution of sound energy within markers affects the perception of empty time intervals marked by their onsets. We fixed the duration of sound markers to 60 or 100 ms, and manipulated the sound energy distribution by changing their rise and fall times. We used each of these markers as one of the two markers of an empty time interval of 120, 240, or 360 ms. The other marker was always a 20-ms marker with a fixed rise and fall time of 10 ms. We measured points of subjective equality (PSEs) of these time intervals. The results showed significant effect of sound energy distribution, but only in the shortest time interval of 120 ms. In this condition, a longer rise time, thus a shorter fall time, of the first marker decreased the subjective duration of the interval.