Objective: To analyze perceptual-auditory and acoustic characteristics of children's voices of different age ranges. Patients and Methods: Ninety-three 3- to 10-year-old children grouped from 3 to 5, 6 to 7, and 8 to 10 years served as participants. The severity of vocal deviation and the parameters of roughness, breathiness, strain, and instability were assessed using a visual analog scale. We calculated the mean and standard deviation of fundamental frequency (F₀), jitter, shimmer, and glottal-to-noise excitation ratio for the sustained vowel, and the mean of F₀ variability for connected speech. Results: The most affected voices were in the age range 8-10 years, and only the phonation tension level was reduced as a result of aging. There were significant differences between children aged 3-5 years and the other age ranges for F₀ mean for sustained vowels and F₀ variability. Conclusion: Children aged 8-10 years had the highest severity of vocal deviation. There was a significant reduction of phonation tension and measure of F₀, jitter, and shimmer after the age of 5 years.

Keywords:
Voice quality, Dysphonia, Auditory perception, Acoustics, Child
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2013
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