Abstract
Detectability and latencies of ABR components were studied at several intensities of click stimuli above psycho-acoustical hearing thrershold. And successively the response thresholds of waves 1 to 4 were compared with the wave 5 response threshold (ABR response threshold) in normal hearing human subjects.
The results were as follows: Comparing the delectability of the ABR components at the several intensities above the psycho-acoustical hearing threshold,
1) Stability of the response threshold between wave 3 and wave 5 seemed remarkable. And wave 3 appeared at approximately to to 20dB above the wave 5 response threshold.
2) However each response threshold of wave 1, 2 and 4 showed remarkable discrepancy.
Conclusion: In those patients whose acoustical hearing threshold was not obtained, the detectability of wave 1 to 4 above the wave 5 response threshold should be taken into consideration carefully when ABR patterns were discussed.
