Year: 2012
Type: dissertation
Abstract: Cleft lip and/or palate is a craniofacial condition that can lead to complex speech disorders. In particular, the auditory-perceptual speech assessments of individuals with cleft palate can be difficult because cleft-type compensatory articulations may be outside of English phonology. Therefore, it is desirable to supplement auditory-perceptual assessments with instrumental measurements. In the first study, thirteen participants with cleft-type compensatory articulations completed ultrasound speech exams. The stimuli were repeated VCV combinations (target consonants: [t], [k], [s], [sh], [n], [ng]; vowel contexts: [a], [i], [u]). Ultrasound imaging confirmed auditory-perceptual impressions and revealed covert articulatory movements. In the second study, six participants were assessed after a course of speech therapy. Outcomes were recorded on a severity metric with categories describing auditory-perceptual and motor aspects of speech errors. The severity metric quantified the incremental changes in both dimensions. Based on the research presented, further investigations of cleft palate speech using ultrasound are warranted.
Source: TSpace (University of Toronto)
Author: Bojana Radovanović
Language: English
Subfield: Oral Surgery
Field: Dentistry
Domain: Health Sciences
Open Access status: green
OpenAlex ID: W2757371038