[The evaluation for hearing aids fitting by using TR60 (a new system of hearing aids fitting)].

We have studied 131 patients (over 12 y/o) for hearing aids evaluation by the Noise Impulse Hearing Test using the fitting system TR 60 and have compared the test results with the subjective estimation of the patients wearing hearing aids. The judgement for selection of hearing aids by TR 60 is made by measuring most comfortable level (MCL) on the condition of wearing hearing aids, using narrow band noise under broad band noise of 50dB (A), and by comparing MCL with that of normal hearing individuals. In 76.3% of cases, the subjective evaluation are agreed with judgements obtained from TR 60; The agreement was seen in 85.7% of cases with conductive hearing loss, and in 74.8% of cases with sensorineural hearing loss. According to the audiometric pattern, cases with abrupt high tone loss showed low agreement rate. In the sub-group classified by hearing level, the rate is lowest in the cases with moderate hearing loss, and highest in the cases with severe hearing loss. The Noise Impulse Hearing Test seems to be useful enough for an adequate hearing aids evaluation.