小児の開鼻声の定量的評価

概要

論文の詳細を見る
This study investigated the acoustical characteristics of hypernasality in children for a quantitative evaluation. The subjects consisted of an experimental group of 39 children with repaired cleft lips or palates and congenital velopharyngeal incompetence, and a control group of 152 normal children. Ages ranged from 4 to 8. The materials consisted of 5 Japanese vowels. Speech therapists were requested to make auditory evaluations of the utterances of the pathological group in terms of degree of hypernasality using three level rating scale: severe, mild and absent. The isolated vowels /i/ uttered by the subjects were analyzed acoustically by cepstrum analysis. Measurement was made of the absolute value of the regression coefficient of the regression line for the spectrum envelope (=the slope of spectrum envelope) of certain bands. Significant differences were found between the following groups: 1) The control group and the group judged to have severe hypernasality (p<0.01) . 2) The control group and the group judged to have mild hypernasality (p<0.05) . 3) The groups which were judged to have severe hypernasality, and that in which judged hypernasality was judged absent (p<0.01) . 4) The groups which were judged to have severe and mild hypernasality, and that in which hypernasality was judged absent (p<0.05) .
日本音声言語医学会の論文