Results of the Evoked Response Audiometry of 97 Young Children and a Comparison with Behavioral Thresholds

Abstract

Ninety-seven young children were tested their hearing acuities by the behavioral tests and the evoked response audiometry in sleep in 1969. Most of their age ranged from 1 to 3 years old. The chlorpromazine and monosodium trichlorethyl phosphate syrup were given to induce sleep. Ten cases failed to sleep for the first test, but they succeded to sleep for the second test. Fifty-five cases showed their P₂ latencies around 200msec, 15 cases around 250msec and 12 cases 300msec or more.
ERA thresholds of 59 cases were compared with behavior thresholds. The threshold differences revealed that 68% of them were within ±10dB.
Our cases included mentally retarded children, which affected the results of the behavioral tests, and 10 cases showed the lower threshold of more than 10dB in ERA. No conclusion was made about in what degree ERA threshold gave higher threshold than those of the behavioral tests.