Evaluation of tinnitus retraining therapy for patients with normal audiograms versus patients with hearing loss

Chronic tinnitus with normal audiometry and with hearing loss both showed adaptation with TRT. Normal audiometry group with chronic tinnitus may have damage in high frequency though there were not significant differences between two groups as to tinnitus pitch-match. They also need at least 18 months TRT to become adaptation, while 48 months treatment is enough and first 3 months treatment is very important for hearing loss with chronic tinnitus.