| Further studies of phonation threshold pressure in a physical model of the vocal fold mucosa. | |
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MedLine Citation:
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PMID: 9193059 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This paper reports results of further experimentation on a previously developed physical model of the vocal-fold mucosa [Titze et al., J. Acoust. Soc. Am. 97, 3080-3084 (1995)]. The effects of vocal-fold thickness, epithelial membrane thickness, and prephonatory glottal geometry on phonation threshold pressure were studied. Phonation threshold pressures in the range of 0.13 to 0.34 kPa were observed for an 11-mm-thick vocal fold with a 70-micron-thick "epithelial" membrane for different "mucosal" fluid viscosities. Higher threshold pressure was always obtained for thinner vocal folds and thicker membranes. In another set of experiments, lowest offset threshold pressure was obtained for a rectangular or a near-rectangular prephonatory glottis (with a glottal convergence angle within about +/- 3 degrees). It ranged from 0.07 to 0.23 kPa for different glottal half-widths between 2.0 and 6.0 mm. The threshold for more convergent or divergent glottal geometries was consistently higher. This finding only partially agrees with previous analytical work which predicts a lowest threshold for a divergent glottis. The discrepancy between theory and data is likely to be associated with flow separation from a divergent glottis. |
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Authors:
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R W Chan; I R Titze; M R Titze |
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Publication Detail:
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Type: Journal Article; Research Support, U.S. Gov't, P.H.S. |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 101 ISSN: 0001-4966 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 1997 Jun |
Date Detail:
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Created Date: 1997-07-29 Completed Date: 1997-07-29 Revised Date: 2007-11-14 |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 3722-7 Citation Subset: IM |
Affiliation:
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Department of Speech Pathology and Audiology, University of Iowa, Iowa City 52242, USA. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Humans Models, Anatomic Mucous Membrane / physiology Phonation / physiology* Psychophysics Pulmonary Ventilation / physiology* Sound Spectrography Speech Acoustics Vocal Cords / physiology* |
| Grant Support | |
ID/Acronym/Agency:
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PG0 DC00976/PG/OAPP OPHS HHS |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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