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ENGLISH ABSTRACT
JOURNAL ARTICLE
[Vocal efficiency parameters in children and adolescents: effect of physical development and singing activity].
HNO 2006 December
The influence of physical development and singing activity on vocal efficiency in children and adolescents is well known from clinical experience. There is, however, no comparative study between singing and non-singing children which also considers the influence of age and gender. Therefore, standard values for evaluation in clinical practice are missing. We examined the following parameters in 164 healthy children and adolescents (90 boys, 74 girls; 11-16 years), 86 without singing activity (group A) and 78 members of children's and youth choirs (group B): frequency and dynamic range of voice and its borders with a voice range profile, mean fundamental frequency (normal and loud phonation), maximum voice intensity, and maximum duration of intonation. The statistical analysis was performed using three-way ANOVA. We found significantly higher ranges of frequency and intensity in singing children and adolescents (p<0.0001). The borders of the dynamic range and the upper border of the frequency range were significantly higher in group B (p<0.0001). The boys in group B used a higher mean fundamental frequency during loud phonation. There were no significant differences between groups in maximum voice intensity (p=0.051) but a tendency towards higher values in singing children. As an unexpected result, we found significantly higher values in maximum duration of intonation in group A (p<0.0001) independent of age and gender, which seems to be related to the methods used. Regular training of the singing voice results in positive effects on several voice parameters in children as well as adolescents. Our results can be used for estimating standard values in professional clinical and educational care of young singing voices and non-singing children. For this purpose, voice range profile is particularly suitable.
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