Numerical simulation of human voice production using aeroelastic model of self-oscillations of the vocal folds and finite element model of the vocal tract
J. Horáčeka,*, P. Šidlofa, J.G. Švecb, F. Griffond-Boitierc
aInstitute of Thermomechanics, Academy of Sciences of the Czech Republic, Dolejškova 5, 182 00 Prague 8, Czech Republic bMedical Healthcom, Ltd, Centre for Communication Disorders, Řešovská 10/491, 181 00 Prague 8, Czech Republic cApplied Mechanics Laboratory RC, University of Besancon, 24 rue de l'Epitaphe, 25000 Besancon, France
ABSTRACT
A complex mathematical model for simulating phonation of the Czech vowel /a/ is presented. The model is based on simulation of the airflow-excited self-sustained vocal fold oscillations, where the non-linear aerodynamic terms and the Hertz model of the contact (collision) forces between the vocal folds are taken into account. The output signals (intraglottal pressure or glottal airflow rate) in the time domain are used for excitation of the finite element (FE) model of the acoustic spaces of the human vocal tract obtained from magnetic resonance imaging (MRI).
Keywords:
Flow-induced vibrations; Human voice biomechanics; Non-linear dynamics; Self-sustained vibrations; Vibroacoustics