FIG. 3.

(A) Auditory brainstem response (ABR) thresholds to clicks were measured at pre-blast, post-blast day 1 (PB1D), post-blast day 14 (PB14D), post-blast day 28 (PB28D), and post-blast day 90 (PB90D). ABR thresholds were significantly elevated at post-blast day 1, and then returned to baseline level at 14, 28, and 90 days post-blast. (B–D) Representative ABR waveforms obtained from before blast, post-blast day 1, and post-blast day 14. Error bars represent standard error of the mean (*p<0.05; SPL, sound pressure level).