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The interplay between prosodic structure and coarticulation

K de Jong1, M E Beckman, J Edwards

  • 1Department of Linguistics, University of California, Los Angeles 90024-1543.

Language and Speech
|April 1, 1993
PubMed
Summary
This summary is machine-generated.

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English stress reduces coarticulation. Stressed syllables are hyperarticulated, meaning speech gestures are more distinct, unlike the sonority expansion theory.

Area of Science:

  • Linguistics
  • Phonetics
  • Speech Science

Background:

  • Prosodic structure and task-dynamic models explain speech gesture interplay.
  • Coarticulation and stress are key features of English prosody.

Purpose of the Study:

  • To investigate the relationship between stress and coarticulation in English.
  • To differentiate between sonority expansion and hyperarticulation hypotheses for stressed syllables.

Main Methods:

  • Reinterpretation of two experiments involving recorded articulator movements.
  • Analysis of jaw kinematics in accented and unaccented [pap] syllables.
  • Examination of tongue point positions in [put] preceding a [th] in stressed syllables.

Main Results:

Related Experiment Videos

  • Stressed syllables exhibited less coarticulatory overlap compared to unaccented ones.
  • Jaw targets were undershot in unaccented syllables, suggesting hyperarticulation.
  • Increased tongue retraction in stressed syllables and reduced assimilation of alveolar stops were observed.

Conclusions:

  • Results support the hyperarticulation hypothesis, not sonority expansion.
  • Reduced coarticulation in stressed syllables is attributed to hyperarticulation.
  • Stress in English leads to more distinct, less overlapping speech gestures.