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Related Experiment Videos

Interarticulator programming in VCV sequences: lip and tongue movements.

A Löfqvist1, V L Gracco

  • 1Haskins Laboratories, New Haven, Connecticut 06511, USA. lofquist@haskins.yale.edu

The Journal of the Acoustical Society of America
|March 25, 1999
PubMed
Summary
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Tongue movements for speech articulation often begin before lip closure for stop consonants like /p/ and /b/. This timing allows for smooth transitions between vowel sounds in speech production.

Area of Science:

  • Linguistics
  • Speech Science
  • Phonetics

Background:

  • Understanding the precise timing of articulatory movements is crucial for speech production models.
  • Vowel-consonant-vowel (VCV) sequences involve complex coordination between the tongue and lips.
  • Bilabial stop consonants (/p/, /b/) provide a clear point of lip closure for analysis.

Purpose of the Study:

  • To investigate the temporal relationship between tongue and lip movements during VCV sequences.
  • To analyze the timing of articulatory movements relative to bilabial stop consonant closure.
  • To examine how vowel context and consonant voicing affect interarticulator timing.

Main Methods:

  • Recorded articulatory movements using a magnetometer system in four adult subjects.

Related Experiment Videos

  • Analyzed vowel-consonant-vowel sequences with asymmetrical vowel contexts (/i/, /a/, /u/).
  • Focused on the onset and trajectory of tongue and lip movements relative to consonant closure.

    • Main Results:

    • Tongue movement onset between vowels typically preceded oral closure for the stop consonant.
    • A significant portion of tongue movement occurred during the consonant's oral closure phase.
    • Earlier tongue movement onset correlated with increased tongue movement trajectory, varying by subject.

    Conclusions:

    • Results support a temporal window hypothesis, where tongue movement can initiate before consonant closure.
    • Early tongue movement onset and extensive pre-closure movement may influence perceived vowel sounds.
    • Interarticulator timing and kinematics show subject-specific variations influenced by voicing and vowel context.