Numerical simulation of flow-induced sound in human voice production

0395680 - ÚT 2014 RIV NL eng J - Journal Article
Šidlof, Petr - Zörner, S. - Huppe, A.
Numerical simulation of flow-induced sound in human voice production.
Procedia Engineering. Roč. 61, č. 2013 (2013), s. 333-340. E-ISSN 1877-7058.
[ParCFD 2013 International conference /25./. Changsha, 20.05.2013-24.05.2013]
R&D Projects: GA ČR(CZ) GAP101/11/0207
Institutional support: RVO:61388998
Keywords : aeroacoustics * parallel CFD * human voice * biomechanics * vocal folds
Subject RIV: BI - Acoustics

The aeroacoustic mechanisms in human voice production are complex coupled processes, which are not fully understood until now. The paper presents a hybrid numerical approach to the solution of the acoustic field in human vocal tract, when the fluid flow is first solved by a dedicated CFD solver on a fine computational mesh covering the larynx. Subsequently, the acoustic sources and propagation of the sound waves are calculated by Lighthill's analogy or acoustic perturbation equations on a coarse mesh covering the whole vocal tract including radiation region. The CFD simulation was run in parallel on a SGI Altix UV shared-memory supercomputer; strong and weak parallel performance was tested for up to 50 computational cores. The spectra of the radiated sound for two vowels/i/and/u/evaluated from the acoustic simulation show good agreement with the formant frequencies known from human subjects.
Permanent Link: http://hdl.handle.net/11104/0224094