| Vocal tract changes caused by phonation into a tube: A case study using computer tomography and finite-element modeling. | |
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MedLine Citation:
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PMID: 21303012 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Phonation into a glass tube is a voice training and therapy method that leads to beneficial effects in voice production. It has not been known, however, what changes occur in the vocal tract during and after the phonation into a tube. This pilot study examined the vocal tract shape in a female subject before, during, and after phonation into a tube using computer tomography (CT). Three-dimensional finite-element models (FEMs) of the vocal tract were derived from the CT images and used to study changes in vocal tract input impedance. When phonating on vowel [a:] the data showed tightened velopharyngeal closure and enlarged cross-sectional areas of the oropharyngeal and oral cavities during and after the tube-phonation. FEM calculations revealed an increased input inertance of the vocal tract and an increased acoustic energy radiated out of the vocal tract after the tube-phonation. The results indicate that the phonation into a tube causes changes in the vocal tract which remain also when the tube is removed. These effects may help improving voice production in patients and voice professionals. |
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Authors:
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Tomáš Vampola; Anne-Maria Laukkanen; Jaromír Horáček; Jan G Švec |
Publication Detail:
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Type: JOURNAL ARTICLE |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 129 ISSN: 1520-8524 ISO Abbreviation: - Publication Date: 2011 Jan |
Date Detail:
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Created Date: 2011-2-9 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: - |
Other Details:
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Languages: ENG Pagination: 310 Citation Subset: - |
Affiliation:
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Faculty of Mechanical Engineering, Department of Mechanics, Biomechanics and Mechatronics, Czech Technical University in Prague, Karlovo náměstí 13, 121 35 Prague 2, Czech RepublicDepartment of Speech Communication and Voice Research, University of Tampere, FIN 33014 Tampere, FinlandInstitute of Thermomechanics, Academy of Sciences of the Czech Republic, Dolejškova 5, 182 00 Prague 8, Czech RepublicLaboratory of Biophysics, Faculty of Sciences, Department of Experimental Physics, Palacky University Olomouc, 17. Listopadu 12, 771 46 Olomouc, Czech Republic. |
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