Exemplar neurons for each response groups. A: exemplar units are displayed for each of the 4 groups of robust, balanced, insensitive, and brittle. Top: raster plots of 4 different single units' responses to the Trilltwitter call in WGN; bottom: same units' responses to the Trilltwitter call in Babble. Color denotations of dots in raster plots are the same as in Fig. 2A. The same color indicators as in Fig. 6A are used for raster plot outlines. B: EI profiles corresponding to the same 4 exemplar neural responses shown in A. W1–W4/B1–B4 indicate neural response group under WGN/Babble condition as robust, balanced, insensitive, and brittle, respectively.