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A hybrid approach to the computational aeroacoustics of human voice production
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SYSNO ASEP 0444185 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název A hybrid approach to the computational aeroacoustics of human voice production Tvůrce(i) Šidlof, Petr (UT-L) RID
Zörner, S. (AT)
Huppe, A. (AT)Zdroj.dok. Biomechanics and Modeling in Mechanobiology - ISSN 1617-7959
Roč. 14, č. 3 (2015), s. 473-488Poč.str. 16 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova computational aeroacoustics ; parallel CFD ; human voice ; vocal folds ; ventricular folds Vědní obor RIV BI - Akustika a kmity CEP GAP101/11/0207 GA ČR - Grantová agentura ČR Institucionální podpora UT-L - RVO:61388998 UT WOS 000354408100004 EID SCOPUS 84939886925 DOI 10.1007/s10237-014-0617-1 Anotace The aeroacoustic mechanisms in human voice production are complex coupled processes that are still not fully understood. In this article, a hybrid numerical approach to analyzing sound generation in human voice production is presented. First, the fluid flow problem is solved using a parallel finite-volume computational fluid dynamics (CFD) solver on a fine computational mesh covering the larynx. The CFD simulations are run for four geometrical configurations: both with and without false vocal folds, and with fixed convergent or convergent–divergent motion of the medial vocal fold surface. Then the aeroacoustic sources and propagation of sound waves are calculated using Lighthill’s analogy or acoustic perturbation equations on a coarse mesh covering the larynx, vocal tract, and radiation region near the mouth. Aeroacoustic sound sources are investigated in the time and frequency domains to determine their precise origin and correlation with the flow field. The problem of acoustic wave propagation from the larynx and vocal tract into the free field is solved using the finite-element method. Two different vocal-tract shapes are considered and modeled according to MRI vocal-tract data of the vowels /i/ and /u/. The spectra of the radiated sound evaluated from acoustic simulations show good agreement with formant frequencies known from human subjects. Pracoviště Ústav termomechaniky Kontakt Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Rok sběru 2016
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