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KMID : 0378019730160100061
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New Medical Journal
1973 Volume.16 No. 10 p.61 ~ p.64
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Sex Comparison through the Oscillation Number of the Crying Sounds of the New-born
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Abstract
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There are distinct differences of .voices between the male and female human beings but it is to be proved whether there is any sexual difference´ among the infants crying sounds. "baby is not a miniature of adult" is a maxim of pediatrics. If the result of the experiment of the author showed there is. not sexual difference, it will be another, confirmation for the "maxim". In the adults there are differences in voice between the sexes and supposing there is no sexual difference among the babies, then at what stage of growth, the transition takes place, and it will be an interesting matter for a study,
As for the material for the study the babies delivered at the Seoul National University Hospital were used. Within 24 hours after delivery they were made cry by pinching the check and the sounds were recorded on a tape and the oscillations were examined.
The measurement of the oscillation number was carried out by the CATHODE-RAY OSILLOCOPE, and contrasting the unknown oscillation number with a known standard oscillator, the pictures of the shape of the waves were simultaneous taken and the wave lengths and its number were compared.
Among the new-born infants, studied 23 male and 17 female babies as indicated in Table I, the distribution of the oscillation types are shown in Figure 3. As shown in Figure 3, the absence of normal distribution is due apparently to. lack of the number of cases studied:
The mode was 1, 400 c/s. The total mean value for both sexes was 1, 997 c/s and for the male 1, 994 c/s and or the female 2, 000 c/s. Therefore, there was not much difference between the sexes.
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