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Modeling and perception of 'gesture reduction'.

R Carré1, P L Divenyi

  • 1ENST, Unité Associée au CNRS, Paris, France. carre@tsi.enst.fr

Phonetica
|September 19, 2000
PubMed
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This study models vowel reduction using gesture reduction within the Distinctive Region Model (DRM). Findings reveal that both formant trajectory and time course are crucial for perceiving reduced vowel transitions.

Area of Science:

  • Phonetics
  • Speech Science
  • Auditory Perception

Background:

  • Vowel reduction is a common phenomenon in spoken language.
  • Existing models may not fully capture the acoustic and perceptual aspects of reduced speech.
  • The Distinctive Region Model (DRM) offers a framework for analyzing vocal tract gestures.

Purpose of the Study:

  • To investigate vowel reduction by modeling 'gesture reduction' using the Distinctive Region Model (DRM).
  • To define 'gesture' as an acoustically efficient command affecting vocal tract area function.
  • To explore the perceptual requirements for understanding vowel-to-vowel transitions with reduced gestures.

Main Methods:

  • Modeling gesture reduction within the Distinctive Region Model (DRM).
  • Defining vocal tract gestures in terms of time-domain area function deformation.

Related Experiment Videos

  • Conducting perceptual tests on vowel-to-vowel transitions produced with reduced gestures.

    • Main Results:

    • A dual representation, including F(1)-F(2) plane trajectory and formant time course, is necessary to explain vowel reduction.
    • Perceptual evidence suggests auditory processing integrates formant trajectory time-domain information.
    • Results link perceptual findings to the acoustic correlates of DRM gestures.

    Conclusions:

    • Vowel reduction is significantly influenced by the degree of vocal tract gesture reduction.
    • Auditory perception of speech transitions relies on processing both spectral and temporal acoustic information.
    • The Distinctive Region Model provides a valuable framework for understanding the acoustic basis of speech perception phenomena like vowel reduction.