Finite element simulation of vocal exercising effects on phonation

0343684 - ÚT 2011 RIV GB eng A - Abstrakt
Horáček, Jaromír - Vampola, T. - Laukkanen, A. M. - Švec, J. G.
Finite element simulation of vocal exercising effects on phonation.
4th Advanced Voice Function Assessment Workshop : Workshop AVFA 10. York: University of York, 2010 - (Grace, A.; Local, J.). s. 26-26. ISSN N.
[Advanced Voice Function Assessment Workshop /4./. 19.05.2010-21.05.2010, York]
Grant CEP: GA ČR GA101/08/1155
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: biomechanics of voice * FE modeling of voice production * vocal economy
Kód oboru RIV: BI - Akustika a kmity

The study investigated the effects of the vocal tract changes on sound energy transfer from the vocal tract. Two 3D finite element (FE) computer models were constructed, based on CT measurements of a female subject phonating on [a:] before and after phonation into a tube. A short pulse of acoustic flow velocity was used as the acoustic excitation of the FE models at the vocal folds level and the acoustic pressure in front of the mouth was numerically simulated. Comparison of the SPL computed inside and outside the vocal tract showed that formants differ in their cost-efficacy, F4 being the most effective. Consequently, a sound energy concentration around 3.5 kHz (F4-F6) region is an effective tool for communication. Based on the FE modeling results, the changes observed in the vocal tract able alone to explain the measured increase in SPL.
Trvalý link: http://hdl.handle.net/11104/0186105