Fig. 4.

Blast animals experienced sustained alterations in click ABR thresholds for at least 1 mo, whereas noise animals appear unaffected. Click ABR threshold changes indicate a significant group effect, with blast group thresholds significantly higher (worse) than the noise group. A time point effect was also present for the blast group with both 2-wk and 1-mo postexposure thresholds significantly higher (worse) than preinjury recordings. Noise group animals did not exhibit any time-dependent significant alterations in click ABR thresholds. Blast thresholds were significantly higher (worse) than noise thresholds at both postinjury time points. Data are means ± SE.