Figure 7. Inhibitory tuning differences between GLM and NRC STRFs.

(A)–(C) Comparison of inhibitory tuning properties of GLM and NRC STRFs. (A) Best frequency of the excitatory region (iBF), (B) excitatory spectral bandwidth (iBW), and (C) excitatory temporal bandwidth (itBW). We found no significant differences in iBF between NRC and GLM STRFs derived from neural responses to ml noise, or those derived from responses to song (p>0.8, two-sample KS test). However, we found that differences in iBW determined by the estimation algorithms were significant for noise but not for songs (**p<10⁻³, two-sample KS test), and differences in itBW were highly significant both for songs and noise (**p<10⁻³, two-sample KS test). (D)–(E) Comparison of inhibitory tuning properties of song and noise STRFs. (D) iBF, (E) iBW and (F) itBW. We found no significant difference in iBF between song and noise STRFs in ether of the models (p>0.1). Differences in iBW between song and noise STRFs were significant for NRC (*p<0.05) but not for the GLM (p>0.8). Finally, we found significant differences between song and noise STRFs in terms of itBW for NRC but not for the GLM (*p<0.05 and p>0.4, respectively). Error bars represent SEs.