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Dynamic articulatory model based on multidimensional invariant-feature task representation.

T Kaburagi1, M Honda

  • 1Department of Acoustic Design, Kyushu Institute of Design, Fukuoka, Japan.

The Journal of the Acoustical Society of America
|August 18, 2001
PubMed
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This study introduces a dynamic model for articulatory movements, defining phonemic tasks using invariant features. The model explains speech variability using context-independent phonemic tasks and dynamic smoothness.

Area of Science:

  • Speech Science
  • Linguistics
  • Robotics

Background:

  • Articulatory speech production involves complex movements of vocal tract structures.
  • Understanding the relationship between phonemic goals and articulatory execution is crucial for speech modeling.

Purpose of the Study:

  • To introduce a dynamic model for articulatory movements.
  • To formally define phonemic tasks using invariant features of articulatory posture.
  • To explain contextual articulatory variability using context-independent phonemic tasks.

Main Methods:

  • Developing a dynamic model based on invariant features of articulatory posture.
  • Utilizing statistical analysis of measured articulatory movements to identify invariant features.
  • Constraining kinematic states of articulators using phonemic tasks and dynamic smoothness.

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Main Results:

  • Identified invariant features characterized by linear transformation of articulatory variables.
  • Demonstrated that underspecified phonemic targets and dynamic smoothness explain contextual variability.
  • Quantitatively investigated the model's predictive capability using empirical data.

Conclusions:

  • The dynamic model effectively represents phonemic tasks and explains articulatory variability.
  • Invariant features provide a robust method for defining phonemic targets in speech production.
  • The model offers a framework for understanding the interplay between phonemic goals and motor control in speech.