Prenatal tests of hearing are practically of great value in making an early diagnosis of deafness. Attempts were made to develop a relatively simple method of prenatal tests of hearing, and 134 fetuses of the 6th–10th month period of pregnancy were examined by means of this method. Pure tones of frequency 500, 1,000 and 2,000 Hz generated by a conventional audiometer were used as acoustic stimuli. Movements of the fetus as well as changes in the fetal pulse rate occurring during or immediately after the stimulation were used as criteria for the auditory response. One hundred and twenty-four of 134 fetuses responded to the stimulating tones, while the remaining 10 showed no responses. No responses were found in the fetuses in the 6th month of pregnancy.

Keywords:
Audiology, Prenatal hearing tests
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© 1969 S. Karger AG, Basel
1969
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