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Coordination and coarticulation in speech production

C A Fowler1, E Saltzman

  • 1Haskins Laboratories, New Haven, CT 06511.

Language and Speech
|April 1, 1993
PubMed
Summary

This study explores speech production, defining coordination as flexible articulator relationships and coarticulation as their staggered activation. Findings suggest anticipatory coarticulation is limited, influenced by low-level interactions.

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Area of Science:

  • Linguistics
  • Speech Science
  • Phonetics

Background:

  • Speech production involves complex coordination of articulators.
  • Coarticulation, the influence of surrounding sounds, is a key aspect of speech.
  • Task-dynamic models offer a framework for understanding these processes.

Purpose of the Study:

  • To examine coordination and coarticulation within a task-dynamic model of speech production.
  • To investigate the nature and limitations of anticipatory coarticulation.
  • To explain context-sensitivity in coarticulation, such as coarticulation resistance.

Main Methods:

  • Conceptual analysis within a task-dynamic framework.
  • Examination of the relationships between articulatory coordination and coarticulation.
  • Theoretical modeling of temporal activation and constraints.

Main Results:

  • Coordination involves transient, flexible, and context-sensitive constraints among articulators for phonetic gestures.
  • Coarticulation arises from the temporally staggered activation of these coordinative constraints.
  • The anticipatory coarticulatory field is suggested to be more limited than previously proposed.
  • Context-sensitivity in coarticulation is attributed to low-level interactions between overlapping gestures' constraints.

Conclusions:

  • Coordination and coarticulation are integral components of speech production, explained by a task-dynamic model.
  • Anticipatory coarticulation is initiated by the activation of coordinative constraints for upcoming gestures.
  • Low-level interactions significantly contribute to the context-specific variations observed in coarticulation.

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