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Název:
The Influence of Different Geometries of Human Vocal Tract Model on Resonant Frequencies
Autoři: Valášek, Jan ; Sváček, Petr ; Horáček, Jaromír
Typ dokumentu: Příspěvky z konference
Konference/Akce: Topical Problems of Fluid Mechanics 2018, Praha (CZ), 20180221
Rok: 2018
Jazyk: eng
Abstrakt: 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
Klíčová slova: aeroacoustic analogies; perfectly matched layer; transfer function; wave equation
Číslo projektu: GA16-01246S (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: Topical Problems of Fluid Mechanics 2018, ISBN 978-80-87012-65-9, ISSN 2336-5781
Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0285158
Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-383503
Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav termomechaniky
Konferenční materiály > Příspěvky z konference
Autoři: Valášek, Jan ; Sváček, Petr ; Horáček, Jaromír
Typ dokumentu: Příspěvky z konference
Konference/Akce: Topical Problems of Fluid Mechanics 2018, Praha (CZ), 20180221
Rok: 2018
Jazyk: eng
Abstrakt: 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
Klíčová slova: aeroacoustic analogies; perfectly matched layer; transfer function; wave equation
Číslo projektu: GA16-01246S (CEP)
Poskytovatel projektu: GA ČR
Zdrojový dokument: Topical Problems of Fluid Mechanics 2018, ISBN 978-80-87012-65-9, ISSN 2336-5781
Instituce: Ústav termomechaniky AV ČR (web)
Informace o dostupnosti dokumentu: Dokument je dostupný v příslušném ústavu Akademie věd ČR.
Původní záznam: http://hdl.handle.net/11104/0285158
Trvalý odkaz NUŠL: http://www.nusl.cz/ntk/nusl-383503
Záznam je zařazen do těchto sbírek:
Věda a výzkum > AV ČR > Ústav termomechaniky
Konferenční materiály > Příspěvky z konference
Záznam vytvořen dne 2018-07-30, naposledy upraven 2022-09-29.