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Related Experiment Videos

The trough effect: implications for speech motor programming.

Björn Lindblom1, Harvey M Sussman, Golnaz Modarresi

  • 1Department of Linguistics, University of Texas, Austin, Tex 78712, USA.

Phonetica
|December 18, 2002
PubMed
Summary
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The trough effect in speech is a brief pause in tongue or lip movement during speech production. This finding suggests a segment-by-segment speech pattern, impacting coarticulation models.

Area of Science:

  • Phonetics and Speech Science
  • Articulatory Phonology
  • Speech Production

Background:

  • The trough effect, a phenomenon in speech production, is empirically observed but lacks theoretical explanation.
  • Understanding speech coarticulation is crucial for modeling speech kinematics.

Purpose of the Study:

  • To investigate the theoretical significance of the trough effect.
  • To document the trough effect in open (V.CV) and closed (VC.V) syllable structures.

Main Methods:

  • Utilized a multifaceted instrumental approach combining spectrography, cineradiography, and vocal tract modeling.
  • Examined symmetrical vowel contexts surrounding labial stops in different syllable structures.

Main Results:

Related Experiment Videos

  • Documented the trough effect as a transient deactivation of articulatory movements (tongue/lip) post-V1 and during stop closure.
  • Provided empirical evidence supporting a segment-by-segment activation pattern in speech production, rather than a continuous vowel-to-vowel trajectory.

    • Conclusions:

    • The trough effect represents a distinct articulatory event that challenges continuous trajectory models.
    • Incorporating the trough effect into quantitative models is essential for accurately representing speech coarticulation and kinematic properties.