Perceptual and Acoustical assessment of voice in children with cleft lip and palate

Abstract

BACKGROUND: The speech of individuals with cleft lip and palate is primarily characterized by nasality of oral speech because of cleft and or velopharyngeal dysfunction. OBJECTIVES: The aim of the present study is to investigate the acoustical assessment and perceptual rating measurements in cleft lip and palate children. METHODS: The study participants included 30 children with cleft lip and palate in the age range of 4 to 12 years. Prior parental consent was obtained for the inclusion of their children in the study. Speech samples of all the l the participants were recorded. Prerecorded speech samples of the individuals of the CLP groups were mixed and randomized and played,using headphone conditions in a quiet room. The SLPs speech language pathologists rated the nasality of the participant. Samples given for perceptual evaluation are 15 phonation samples of /ă/, /ɪ/ and /ŭ/ vowels vowel, 15 conversation samples and 30 subjects (3 oral sentences each so total 90 sentences). RESULTS: For the Phonation sample, SLP must evaluate the presence of hypernasality by Wilcoksons nasality scale. Acoustic analysis was done using PRAAT software. The spectral and temporal parameters were measured. The Kappa coefficient was 0.88 for inter-rater reliability for nasality rating scale, 0.82 for speech intelligibility,1.02 for speech understandability,1.00 for speech acceptability, which suggests substantial agreement between the raters for four different rating scales. CONCLUSION: Thus, to conclude in children with cleft lip and palate both acoustical and perceptual evaluation plays an important role while assessing the speech domain by using different kinds of speech stimuli.