AUDIOLOGY JAPAN
Online ISSN : 1883-7301
Print ISSN : 0303-8106
ISSN-L : 0303-8106
Distorted Speech Audiometry in Normal Children
Masaaki NagafuchiYozo Marutake
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JOURNAL FREE ACCESS

1974 Volume 17 Issue 1 Pages 33-44

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Abstract

The auditory intelligibility of the distorted monosyllables and words were studied in nomal children.
Four conditions of distortion were of expansion (1.5, 2 and 3 times) and compression (0.7, 0.5 and 0.25 times) of frequency and time compoennts, respectvely. The subjects consisted of 160 children, half boys and half girls, aged 4 to 11 years, including 10 subjects in each age and sex group, and 10 young adults.
The results were as follows:
1) Frequency-expanded and -compressed tests
The greater the rate of expansion and compression, the poorer the intelligibility was in all subjects. When the age advanced, the intelligibility scores improved up to a certain extent in each test. Especially, it was found that the difference was signifficiant in intelligibility scores between the age of 9 and 10 years.
2) Time-expanded and -compressed tests
Discrimination of all three types of time-expanded words was good and the intelligibility scores ranged above 70%. The time-compressed words at the conditions of 0.7 and 0.5 times were also discriminated well. On the contrary, the intelligibility scores at the condition of 0.25 time decreased steeply to around 50%. With increasing age, the intelligibility improved gradually without significant differerence between any ages.
At the present test, there was no significant difference in intelligibility scores between boys and girls.

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© Japan Audiological Society
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