Fig. 3.

DeepSqueak extracts contours based on the concept of tonality. a A contour extracted from a rat “trill” using only peak amplitude. b A contour extracted from a rat “trill” using a tonality threshold of >0.3 to eliminate silence and noise. c A contour extracted from a rat “trill” using a tonality threshold of >0.45 eliminates too much of the call contour. d A contour extracted from a mouse USV using only peak amplitude. e A contour extracted from a mouse USV using a tonality threshold of >0.3 to eliminate silence and a large piece of broad spectrum noise. f A contour extracted from a mouse USV using a tonality threshold of >0.45 eliminates too much of the call contour. g The first 90 USV contours from a B6D2F1 mouse recording