Abstract:The aim of this study was to investigate the values of three acoustic parameters (PPQ, APQ and NHR) in 88 normal elementary school children between the 1st and 3rd grades. The procedure called for the children to vocalize sustained phonation of the vowel [ɑ] for 5 seconds, until a constant pitch of voice was achieved; each child underwent 2 trials. Acoustic analysis was carried out using the Multi-Dimensional Voice Program 5105 of Kay Model 4500. The results revealed that the mean PPQ was higher in the 3rd gra… Show more
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