| Unsteady laryngeal airflow simulations of the intra-glottal vortical structures. | |
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MedLine Citation:
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PMID: 20058989 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The intra-glottal vortical structures developed in a static divergent glottis with continuous flow entering the glottis are characterized. Laryngeal airflow calculations are performed using the Large Eddy Simulation approach. It has been shown that intra-glottal vortices are formed on the divergent wall of the glottis, immediately downstream of the separation point. Even with non-pulsatile flow entering the glottis, the vortices are intermittently shed, producing unsteady flow at the glottal exit. The vortical structures are characterized by significant negative static pressure relative to the ambient pressure. These vortices increase in size and strength as they are convected downstream by the flow due to the entrained air from the supra-glottal region. The negative static pressures associated with the intra-glottal vortical structures suggest that the closing phase during phonation may be accelerated by such vortices. The intra-glottal negative pressures can affect both vocal fold vibration and voice production. |
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Authors:
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Mihai Mihaescu; Sid M Khosla; Shanmugam Murugappan; Ephraim J Gutmark |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 127 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2010 Jan |
Date Detail:
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Created Date: 2010-01-11 Completed Date: 2010-03-01 Revised Date: 2011-07-19 |
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: 435-44 Citation Subset: IM |
Affiliation:
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Department of Aerospace Engineering and Engineering Mechanics, University of Cincinnati, 310 Rhodes Hall, Cincinnati, Ohio 45221-0070, USA. mihai.mihaescu@uc.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Air* Air Pressure Computer Simulation* Glottis / physiology* Humans Kinetics Larynx / physiology* Models, Biological* Phonation / physiology Time Factors Vocal Cords / physiology |
| Grant Support | |
ID/Acronym/Agency:
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R01DC009435/DC/NIDCD NIH HHS |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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