An Analysis of Velopharyngeal Timing in Normal Adult Speakers Using a Microcomputer Based Photodetector System Using a microcomputer interface and dedicated software, a photodetector was employed to collect data on the timing of velopharnygeal movements during the production of speech by 10 normally speaking adult subjects. The duration of velopharnygeal closing gestures varied consistently across productions of /m/, /n/ and /n/ in both normal and ... Research Article
Research Article  |   March 01, 1989
An Analysis of Velopharyngeal Timing in Normal Adult Speakers Using a Microcomputer Based Photodetector System
 
Author Affiliations & Notes
  • Michael J. Keefe
    University of North Carolina at Chapel Hill
  • Rodger M. Dalston
    University of North Carolina at Chapel Hill
Article Information
Research Articles
Research Article   |   March 01, 1989
An Analysis of Velopharyngeal Timing in Normal Adult Speakers Using a Microcomputer Based Photodetector System
Journal of Speech, Language, and Hearing Research, March 1989, Vol. 32, 39-48. doi:10.1044/jshr.3201.39
History: Received September 8, 1987 , Accepted April 21, 1988
 
Journal of Speech, Language, and Hearing Research, March 1989, Vol. 32, 39-48. doi:10.1044/jshr.3201.39
History: Received September 8, 1987; Accepted April 21, 1988

Using a microcomputer interface and dedicated software, a photodetector was employed to collect data on the timing of velopharnygeal movements during the production of speech by 10 normally speaking adult subjects. The duration of velopharnygeal closing gestures varied consistently across productions of /m/, /n/ and /n/ in both normal and fast speech. Velopharyngeal opening movements also appeared to be affected by the nasal consonant that was produced. These phenomena are explained in terms of biomechanical constraints known to act upon the velopharyngeal mechanism.

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