Voice Outcomes of Clear Speech Cueing in Individuals With Parkinson's Disease.
Voice Outcomes of Clear Speech Cueing in Individuals With Parkinson's Disease.
Where did the research take place?
The study site has not been established. Author addresses may differ from where the research occurred.
A plain-language reading has not been prepared for this paper yet.
Original abstract
PurposeThe purpose of this study was to investigate acoustic and auditory-perceptual voice outcomes of clear speech cueing in individuals with Parkinson's disease (PD).MethodSpeakers with PD completed speaking tasks (a spontaneous speech sample and a standard reading passage) in two speaking conditions: typical and clear speech. Acoustic measures of vocal intensity, fundamental frequency (fo) variation, cepstral peak prominence (CPP), and low-to-high (L/H) ratio were calculated. Expert listeners completed auditory-perceptual ratings of the overall severity of dysphonia, breathiness, and strain of samples using visual-analog scales. Acoustic and auditory-perceptual measures were compared across speaking conditions and tasks.ResultsIntensity significantly increased in the clear speech condition compared with typical speech. When controlling for intensity, fo variation increased, and L/H ratio decreased in the clear speech condition. Breathiness decreased from typical to clear speech. There were no condition differences in CPP when accounting for intensity and no condition differences in overall severity of dysphonia or strain.ConclusionsTargeting the articulatory subsystem with clear speech cueing in PD elicits acoustic and auditory-perceptual changes that align with a louder voice, increased intonational variation, and reduced breathiness. Voice changes with clear speech are not fully explained by concomitant increases in intensity.