The Influence of Different Geometries of Human Vocal Tract Model on Resonant Frequencies

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F18%3A00487121" target="_blank" >RIV/61388998:_____/18:00487121 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21220/18:00321325

Výsledek na webu

<a href="http://dx.doi.org/10.14311/TPFM.2018.041" target="_blank" >http://dx.doi.org/10.14311/TPFM.2018.041</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14311/TPFM.2018.041" target="_blank" >10.14311/TPFM.2018.041</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Influence of Different Geometries of Human Vocal Tract Model on Resonant Frequencies

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

The Influence of Different Geometries of Human Vocal Tract Model on Resonant Frequencies

Popis výsledku anglicky

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

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10307 - Acoustics

Projekt

<a href="/cs/project/GA16-01246S" target="_blank" >GA16-01246S: Počítačové a experimentální modelování samobuzených kmitů hlasivek a vliv jejich poškození na lidský hlas</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Topical Problems of Fluid Mechanics 2018

ISBN

978-80-87012-65-9

ISSN

2336-5781

e-ISSN

—

Počet stran výsledku

8

Strana od-do

307-314

Název nakladatele

Institue of Thermomechanics AS CR

Místo vydání

Praha

Místo konání akce

Praha

Datum konání akce

21. 2. 2018

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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