(A,B) Example click-evoked ABR traces across dB SPL recorded with separate electrode positions. Vertical dashed-line indicates stimulus onset. (C,D) Representative EFR to 64 Hz (C) and 512 Hz (D) AM noise across depths from pin electrode positions in (A) and (B), respectively. (E,F) Normalized FFT values as a function of AM depth corresponding to 64 Hz (E) and 512 Hz (F). (G) Average temporal modulation transfer functions extracted from EFRs from Ctl (black) and HL (orange) animals. Mean ± SEM. Dashed lines represented average behavior TMTFs. (H) Within groups post-hoc comparisons between EFR versus behavior detection thresholds across 64, 128, 256, and 512 Hz AM rates. *p<0.05; **p<0.0001; Holm-Bonferroni- corrected. Filled symbols correspond to gerbils used for awake-behaving ACx recordings.