A command that creates a TextGrid in which the silent and sounding intervals of the selected Intensity are marked.
First the intensity contour is evaluated and the intervals above and below the silence threshold are marked as sounding and silent. We then remove sounding intervals with a duration smaller than the Minimum sounding interval duration. This step is followed by joining the neighbouring silent intervals that resulted because of this removal. Finally we remove silent intervals with a duration smaller than the Minimum silent interval duration. This is followed by joining the neighbouring sounding intervals that resulted because of this removal.
Experience showed that first removing short intensity bursts instead of short silences gave better results than doing it the other way around.
The effectiveness of the Minimum silent interval duration and Minimum sounding interval duration depends on the effective analysis window duration that was used to determine the intensity contour. For example, if you have chosen 100 Hz for the "Minimum pitch" parameter in the Sound: To Intensity... analysis, the effective analysis window duration was 32 ms. Don't expect to find sounding or silent intervals with a duration smaller than this effective analysis window duration.
© djmw, December 1, 2006