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KMID : 0917520000070020051
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Journal of Speech Sciences
2000 Volume.7 No. 2 p.51 ~ p.70
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Acoustic Comparisons of Vowel and Plosive Productions between the Normal and the Hearing-Impaired Children
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Narsing A.Rao
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Abstract
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Twenty normal and 20 severe-to-profound hearing-impaired subjects participated in the present study. The to groups are matched by their chronological age. Each subject made a recording of three vowels of /i/, /a/, and /u/, and nine VC_plosive V(hereafter, VCV) disyllables of /epe/, /ep´e/, /ep^he/, /ete/, /et´e/, /et^he/, /eke/, /ek´e/, and /ek^he/, eahc five times. Formant frequencies of F_1, F_2, and F_3 were measured for the three vowels and six measures were made for the mine disyllables. The six measures were (1) the total duration of the disyllable, (2) the duration of the first vowel, (3) the duration of the closed period, (4) the ratio of the first vowel over the first vowel plus the closure period of the consonant, (5) the duration of the aspiration, and (6) the duration of the second vowel. Results shows that the three formants and each of the measures were significantly different between the two groups of subjects.
Keywords : hearing-impaired, vowel, formant, plosive, duration
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