Absolute threshold shifts after sham/noise exposure.

Click and pure tone (8, 16, and 32 kHz) ABR measurements were performed to assess normal hearing thresholds before beginning behavioral assessments and were performed again after sham/noise exposure to assess hearing loss induced by sham/noise exposure. Absolute threshold shifts (dB SPL) were determined from the absolute differences in thresholds measured after sham/noise exposure and are plotted for the two conditions (sham exposure, white bars; noised, gray bars) for the four stimuli (click, 8 kHz, 16 kHz and 32 kHz). Noise exposed mice showed significantly greater threshold shifts at 16 and 32 kHz compared to sham exposed mice (Mann Whitney rank comparison test). Values and original data are provided in Table 1 and S1 Table.