Vowel spectra simulated using a 3D aeroacoustic model of phonation

0427720 - ÚT 2015 US eng A - Abstrakt
Šidlof, Petr - Zörner, S. - Huppe, A.
Vowel spectra simulated using a 3D aeroacoustic model of phonation.
9th ICVPB. Salt Lake City: National Center for Voice and Speech, University of Utah, 2014. s. 76-76.
[International Conference on Voice Physiology and Biomechanics /9./. 10.04.2014-12.04.2014, Salt Lake City]
Grant CEP: GA ČR(CZ) GAP101/11/0207
Institucionální podpora: RVO:61388998
Klíčová slova: aeroacoustics * vocal folds * phonation
Kód oboru RIV: BI - Akustika a kmity

The paper presents an aeroacoustic model of the sound generation in human vocal tract. The numerical model is built in a hybrid approach, where the fluid flow is solved first by a dedicated CDF solver on a fine 3D grid. Subsequently, the acoustic sources and propagation of the sound waves are calculated by Lighthill's analogy or acoustic perturbation equations on a coarse 3D grid covering the whole vocal tract and a radiation region adjacent to the lips. The spectra of the radiated sound for two vowels, evaluated from the aeroacoustic simulations, are compared with the formant frequencies known from human subjects. Further, the influence of the false vocal folds on the flow and acoustic field is analyzed.
Trvalý link: http://hdl.handle.net/11104/0233459