Abstract

Effect of Co-Articulation on One Third Octave Spectral Amplitudes of Vowel /I/

Highlights

  • Hypernasality is a perceptual quality associated with excessive nasal resonance because of velopharyngeal incompetence [1]

  • The present study aimed to find out the differences in spectral amplitudes between children with repaired cleft lip and palate (RCLP) and typically developing children (TDC) across stimuli

  • One of the major findings of the study is that the energy concentration over the one third octave spectrum was found to be more in RCLP group for across the stimulus compared to TDC group

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Summary

Introduction

Hypernasality is a perceptual quality associated with excessive nasal resonance because of velopharyngeal incompetence [1]. When the two groups were compared, it was shown that the spectrum of hypernasality group was marked by increased spectral amplitudes between F1 and F2 and a reduction in spectral amplitudes around F2 region which differentiated the two groups They obtained a highly significant correlation (r=0.84) between perceptual ratings and amplitudes of one third octave spectral bands (1k, 1.6k, & 2.5 kHz) using multiple regression analysis. Global Journal of Otolaryngology a significant difference between the two groups Another major finding of the study was that the high sensitivity and specificity was found for the frequency region between 998Hz and 2663 Hz which shown to be better differentiating the two groups using 1/3rd octave spectra analysis. Aim of the study: To evaluate one third octave spectral amplitudes of isolated vowel /i/ and in the context of /pit/ and /tip/ in children with RCLP and typically developing children

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