identification of stress placement in speakers with and without dysarthria
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Identification of Stress Placement in Speakers with and without Dysarthria. Pamela Campellone Thomas DiCicco Rupal Patel. Background. Traditional research focus in dysarthria due to CP: Articulation More recent research: Prosody

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identification of stress placement in speakers with and without dysarthria

Identification of Stress Placement in Speakers with and without Dysarthria

Pamela Campellone

Thomas DiCicco

Rupal Patel

background
Background
  • Traditional research focus in dysarthria due to CP: Articulation
  • More recent research: Prosody
  • Acoustic findings: Preserved prosodic control at vowel & word level
background1
Background
  • Are acoustic signals consistent and reliable?
  • Can humans and/or machines make use of these signals?
  • If prosody is a strength, can it be harnessed to improve segmental clarity?
research questions
Research Questions
  • Can listeners identify stress within phrases produced by speakers with dysarthria & age-gender matched healthy controls?
  • How accurate is machine classification of prosodic contrasts?
method
Method
  • Spoken database: 12 speakers with dysarthria (DYS) & 12 healthy controls (HC)
    • 5 phrases (4 monosyllabic words) produced with stress on 1 of the 4 words or neutrally
  • 48 monolingual speakers of American English served as listeners
    • 4 listeners per DYS-HC speaker pair
machine classification
Machine Classification
  • HC & DYS words classified as stressed vs. unstressed
    • HC accuracy: 98.1%
    • DYS accuracy: 97.4%
  • Separate combinations of duration, intensity, & F0 used to determine which were most predictive
conclusions
Conclusions
  • Unfamiliar listeners & machine classifier both highly accurate
  • Communicative potential of prosody
    • Clinically: scaffolding for improved intelligibility
    • Application: communication aids which utilize prosodic variation
future directions
Future Directions
  • Examine productions of speakers with varying etiologies of DYS
    • Differences in acquired vs. congenital?
  • Assess prosodic control in more varied speech tasks
  • Design comprehensive interventions incorporating speaker and listener variables
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