Computer modeling of effects of vocal exercising with a tube on vocal tract sound power transfer

0350559 - ÚT 2011 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Horáček, Jaromír - Vampola, T. - Laukkanen, A. M. - Švec, J. G.
Computer modeling of effects of vocal exercising with a tube on vocal tract sound power transfer.
Interaction and Feedbacks 2010 - Proceedings. Prague: Institute of Thermomechanics AS CR, v.v.i, 2010 - (Zolotarev, I.), s. 29-38. ISBN 978-80-87012-29-1.
[Interaction and Feedbacks 2010 /17./. Prague (CZ), 23.11.2010-24.11.2010]
Grant CEP: GA ČR GA101/08/1155
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: FEM * biomechanics of voice * acoustic
Kód oboru RIV: BI - Akustika a kmity

Two 3D finite element (FE) models were constructed, based on CT measurements of a subject phonating on [a:] before and after phonation into a tube. Acoustic analysis was performed exciting the models by acoustic flow velocity at the vocal folds. The generated acoustic pressure of the response was computed in front of the mouth and inside the vocal tract for both FE models. Average amplitudes of the pressure oscillations inside the vocal tract and in front of the mouth were compared to display a cost-efficiency of sound energy transfer at different formant frequencies. Comparison of the pressure oscillation inside and outside the vocal tract showed that formants differ in their efficiency, F4 (at about 3.5 kHz, i.e. at the speaker’s or singer’s formant region) being the most effective. The results suggest that exercising on semi-occlusions help in improving the vocal economy.
Trvalý link: http://hdl.handle.net/11104/0190535