The effect of changes in velopharyngeal orifice area on vowel intensity

J. E. Bernthal, D. R. Beukelman

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Abstract

This investigation studied the influence of changes in velopharyngeal orifice size on vowel intensity in normal speakers when subglottal air pressure was controlled. Controlled variations in velopharyngeal orifice area were achieved by two different methods. The effective velopharyngeal orifice areas introduced into the subjects were verified aerodynamically. A reduction in vowel intensity was recorded during the large experimental velopharyngeal orifice condition (50 mm2) when compared to a control condition. The clinical implications of these findings are discussed.

Original languageEnglish (US)
Pages (from-to)63-77
Number of pages15
JournalCleft Palate Journal
Volume14
Issue number1
Publication statusPublished - Jan 1 1977

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ASJC Scopus subject areas

  • Surgery

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Bernthal, J. E., & Beukelman, D. R. (1977). The effect of changes in velopharyngeal orifice area on vowel intensity. Cleft Palate Journal, 14(1), 63-77.