Figure 2.

Cochlear marginal statistics. (a) Spectrograms of three sound excerpts, generated by plotting the envelopes of a cochlear filter decomposition. Gray-level indicates the (compressed) envelope amplitude (same scale for all three sounds). (b) Envelopes of one cochlear channel for the three sounds from a. (c) Histograms (gathered over time) of the envelopes in b. Vertical line segments indicate the mean value of the envelope for each sound. (d-g) Envelope marginal moments for each cochlear channel of each of 168 natural sound textures. Moments of sounds in a-c are plotted with thick lines; dashed black line plots the mean value of each moment across all sounds.