Fo-perturbation and Fo/loudness dynamics in voices of normal children, with and without education in singing

Influence of Singing Activity, Age, and Sex on Voice Performance Parameters, on Subjects' Perception and Use of Their Voice in Childhood and Adolescence

“…23, No. 2,2009 had been expected, the parameters of age and gender also exercise significant influence, which must be taken into account when evaluating the results as well as in everyday clinical and voice pedagogical practice.…”

“…1 A comparative study of regularly singing and nonsinging children by Dejonckere et al showed a significantly lower aperiodicity of the basic frequency with the young singers as a manifestation of better mechanical vibration attributes of the vocal cords. 2 Our own comparative study with 78 regularly singing and 86 nonsinging children and adolescents showed significantly better vocal achievement parameters with the young singers. 3 However, singing in these age groups has positive effects not only on voice performance and quality, but also has a favorable influence on language development 4 ; furthermore, it trains the capacity to experience one's own emotions and produce feelings in others, 5,6 thus contributing to a young person's social integration.…”

“…Voice training(1)(2)(3) and vocal strain (C-D). Duration of sustained phonation was longer by 3.0 seconds in boys than in girls (95% CI: 1.5-4.4, P < 0.001) and increased by 0.35 seconds/y (95% CI: 0.10-0.60, P ¼ 0.007).…”

Empirical Criteria for Establishing a Classification of Singing Activity in Children and Adolescents

“…16 A comparative investigation by Dejonckere et al on children who sing regularly and children who do not sing showed a significantly lower aperiodicity of the fundamental frequency in the young singers as a manifestation of the better mechanical characteristics of vocal fold vibration. 17 A comparison study of our own on 78 children and adolescents who sing regularly and 86 children and adolescents who do not sing regularly revealed significantly better voice performance parameters in the former. 13 There is a change in the spectrum of the voice in all adolescents during and after puberty irrespective of their singing activity: increased activity at school and outside school, in particular, sporting activities, affect the voice as do the noisy parties popular in this age group, loud music, and long telephone conversations that are frequently accompanied by emotional outbursts.…”

Describing pediatric dysphonia with nonlinear dynamic parameters

“…An investigation by Ferrand affirmed that this difference exists in both girls and boys [24]. When studying a group of 7–12 year olds, Dejonckere et al showed that jitter values decrease with age, perhaps as a function of membranous vocal fold growth [27]. These findings imply that the pediatric voice requires special considerations when establishing baseline normal and dysphonic values and that care must be taken to differentiate the values from those of adults when necessary.…”