Fig. 1

The experimental schedules and measurements of the present study. The white noise (2–20 kHz, 115 dB SPL), delivered for 4 h per day, for 3 d (noise group, n = 16). Immediately and 4 wk after white noise exposure (noise immediate group, n = 8 and noise 4-week group, n = 8), auditory brainstem responses (ABRs) were measured