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Related Experiment Videos

Variations in velar position over time: a nasal videoendoscopic study.

M P Karnell1, R N Linville, B A Edwards

  • 1University of Chicago.

Journal of Speech and Hearing Research
|September 1, 1988
PubMed
Summary

Velar position changes during speech are linked to syllable timing. This movement pattern, crucial for nonnasal speech, may help identify velopharyngeal incompetence.

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Area of Science:

  • Speech Science
  • Biomechanics
  • Linguistics

Background:

  • Understanding velar movement is key to speech production.
  • Velopharyngeal function impacts speech clarity and intelligibility.
  • Variations in velar position can indicate velopharyngeal dysfunction.

Purpose of the Study:

  • To investigate velar kinematics during nonnasal speech production in adults.
  • To determine the coordination between velar movements and syllable structure.
  • To explore the relationship between velar position, speaking rate, and jaw movement.

Main Methods:

  • Field-by-field videoendoscopic tracking was employed to measure velar position.
  • Two adult participants produced nonnasal speech stimuli.
  • Analysis focused on peak velar displacement, timing, and relation to oral gestures.

Main Results:

  • Velar position changes were coordinated with syllable production, showing a distinct pattern.
  • Peak velar elevation occurred during consonant production (oral closure), followed by lowering during vowels.
  • This movement pattern remained consistent despite alterations in speaking rate and jaw fixation.

Conclusions:

  • The observed velar movement pattern is integral to nonnasal speech production.
  • Timing of velar displacement showed a statistical association with intraoral air pressure in one subject.
  • Studying velar kinematics in nonnasal speech may offer insights into marginal velopharyngeal incompetence.

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