Analyzing Acoustic Characteristics of Voice for Children With Cleft Palate With and Without Compensatory Error Compared to Normal Children

Abstract

Background and Objectives: Voice assessment is one of the five universal parameters in assessing the speech ability of children with cleft palate. One of the characteristics of cleft palate children is the production of compensatory errors. This study aims to compare the acoustic characteristics of the voice, including fundamental frequency, jitter, shimmer, and average harmonic to noise ratio in cleft palate children compared to their normal peers. Methods: A total of 38 children in the age range of 48 to 60 months (17 children with cleft palate and 21 normal peers) participated in this descriptive-analytical and cross-sectional study. The children were asked to produce sustained vowels /a/ and /i/ while their speech samples were being recorded. The acoustic characteristics of the children’s voices were analyzed via the Praat software. Results: There were no statistically significant differences in acoustic parameters between the cleft palate children with and without compensatory errors. There were significant differences between children with cleft palate compared to their normal peers in the jitter averages of the vowel /a/ (P=0.05). The gender differences were found in the harmonic to noise ratio averages of the vowel /a/ between children with cleft palate (P=0.02). Conclusion: Young children with velopharyngeal insufficiency may be at risk of voice problems.