Počet záznamů: 1
Acoustic perturbation equations and Lighthill's acoustic analogy for the human phonation
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SYSNO ASEP 0394350 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Ostatní články Název Acoustic perturbation equations and Lighthill's acoustic analogy for the human phonation Tvůrce(i) Zoerner, S. (AT)
Šidlof, Petr (UT-L) RID
Huppe, A. (AT)
Kaltenbacher, M. (AT)Zdroj.dok. Proceedings of Meetings on Acoustics -ICA 2013, 19. - Montreal : Acoustical Society of America, 2013 - ISSN 1939-800X
Roč. 19, 060309 (2013), s. 1-8Poč.str. 8 s. Forma vydání Online - E Akce ICA 2013 - Meetings on Acoustics Datum konání 02.06.2013-07.06.2013 Místo konání Montreal Země CA - Kanada Typ akce WRD Jazyk dok. eng - angličtina Země vyd. CA - Kanada Klíč. slova vocal folds ; CFD ; computational aeroacoustics Vědní obor RIV BI - Akustika a kmity CEP GAP101/11/0207 GA ČR - Grantová agentura ČR Institucionální podpora UT-L - RVO:61388998 DOI 10.1121/1.4799392 Anotace In speech, air is driven through the larynx by compression of the lungs. Thereby, air flows through the glottis which forces the vocal folds to oscillate which in turn results in a pulsating air flow. This air flow is the main source of the generated sound-the phonation. The acoustic wave then passes through the vocal tract, which acts as a filter modulating the propagated sound leaving the mouth. We model the fluid-structureacoustic interaction with a so called hybrid approach. The air flow in the larynx, together with a prescribed vocal fold motion, is simulated with help of the open source solver OpenFOAM. Based on the resulting fluid field, acoustic source terms and the wave propagation is calculated within the finite element solver CFS++. Two methods are available to choose from, Lighthill's acoustic analogy and an aeroacoustic analogy based on a perturbation ansatz. Additionally, the simulation domain is extended by a realistic but geometrical fixed vocal tract and connected to a propagation region. The different acoustic approaches are compared, by analysing the acoustic pressure in the glottis (source region) and outside the vocal tract. Moreover, to illustrate the effects of the vocal tract an alternative geometry is used for comparison. 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 2014
Počet záznamů: 1