Original title: The Influence of Different Geometries of Human Vocal Tract Model on Resonant Frequencies
Authors: Valášek, Jan ; Sváček, Petr ; Horáček, Jaromír
Document type: Papers
Conference/Event: Topical Problems of Fluid Mechanics 2018, Praha (CZ), 20180221
Year: 2018
Language: eng
Abstract: This paper presents the transfer function approach in order to determine the acoustic resonant frequencies of a human vocal tract model. The transfer function is introduced here as an acoustic pressure ratio between input amplitude at glottis position and output amplitude at mouth opening given by the solution of Helmholtz equation. This equation is numerically approximated by finite element method. The influence of different boundary conditions are studied and also different locations of excitation and microphone. Four different vocal tract geometries motivated by vocal tract geometry for vowel [u:] are investigated. Its acoustic resonance frequencies in range 100 - 2500 Hz are computed and compared with published results. Further, the transient acoustic computation with different acoustic analogies are performed. The frequency spectra of Lighthill analogy, acoustic wave equation and perturbed convective wave equation are compared, where the vocal tract model with best frequency agreement with published results was chosen. The dominant frequencies correspond with predicted frequencies of transfer function approach.\n
Keywords: aeroacoustic analogies; perfectly matched layer; transfer function; wave equation
Project no.: GA16-01246S (CEP)
Funding provider: GA ČR
Host item entry: Topical Problems of Fluid Mechanics 2018, ISBN 978-80-87012-65-9, ISSN 2336-5781

Institution: Institute of Thermomechanics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0285158

Permalink: http://www.nusl.cz/ntk/nusl-383503

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Research > Institutes ASCR > Institute of Thermomechanics
Conference materials > Papers
 Record created 2018-07-30, last modified 2019-03-28

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