1D modeling of the influence of velopharyngeal insufficiency on phonation of vowels

0343360 - ÚT 2011 RIV CZ eng, cze C - Conference Paper (international conference)
Radolf, Vojtěch - Vampola, T.
1D modeling of the influence of velopharyngeal insufficiency on phonation of vowels.
Engineering Mechanics 2010. Prague: Institute of Thermomechanics AS CR, v. v. i., 2010 - (Zolotarev, I.), s. 117-118. ISBN 978-80-87012-26-0.
[Engineering Mechanics 2010. Svratka (CZ), 10.05.2010-13.05.2010]
R&D Projects: GA ČR GA101/08/1155
Institutional research plan: CEZ:AV0Z20760514
Keywords : nasality * transfer matrix method * vocal tract
Subject RIV: BI - Acoustics
www.engmech.cz

Velopharyngeal insufficiency is modeled in frequency domain by the transfer matrix method in connection with conical acoustical elements. The vocal tract is considered as a branched system with two nasal ducts. The influence of viscous losses and radiation impedance both at the level of the lips and at the level of the nostrils are considered. Configuration of the vocal tract corresponds to the vowel /a:/. The modal analysis is performed and the results are compared with those gained from 3D FEM models.
Permanent Link: http://hdl.handle.net/11104/0185859