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Hearing assessment in the tinnitus and control groups. (a) The pure tone audiogram thresholds at the different frequencies are shown for the controls (blue) and the tinnitus (groups). (b) The mean hearing loss calculated over all the frequencies, and (c) the mean hearing disability calculated for 500, 1000, 2000, 4000 Hz are displayed for the controls (blue) and tinnitus (red) groups. The error bars represent standard error.
