Fig. 15.

Comparison of auditory tuning between units. Center frequency (CF, A–C) and frequency tuning peak bandwidth (BW, D–F) are compared between those units with significant and nonsignificant call type differences. Both distributions were overlapping. Significant units had slightly higher median CFs (6.50 vs. 4.59 kHz) and narrower median BWs (0.1 vs. 0.2 octaves), but neither difference was statistically significant (P > 0.05, rank sum). B and E: cumulative distribution functions are shown comparing tuning for units with significant differences between individual call type pairs (colors) and those that failed to distinguish any pairs (open bars). C and F: scatterplots comparing tuning and differences between phees and trillphees. Rate-level curves were calculated for all units based on tone, noise, or vocal playback responses at multiple sound levels. Distributions of the monotonicity index (G–I), the firing rate at maximum SPL divided by the peak response firing rate, and SPL of the peak response (J–L) are also shown. Median values for significant and nonsignificant units were 0.57 vs. 0.60 and 50 vs. 45 dB SPL. Neither difference was statistically significant (P > 0.05, rank sum). H and K: cumulative distribution functions comparing monotonicity and peak SPL for call pair differences. I and L: scatterplots comparing monotonicity and call type differences.