Fig. 4.

Hypothesis-based region-of-interest (ROI) analysis of posterior nonprimary auditory cortex activations during auditory distance processing. A significant increase of left posterior auditory cortex ROI activity was observed during varying distance vs. varying intensity conditions, suggesting that posterior nonprimary auditory cortices include neurons with intensity-independent distance representations. Data also show increased activities in both hemispheres during varying vs. constant stimulation (**P = 0.01, ***P < 0.001, SEM error bars).