Estimation of damping in human vocal folds vibration: measurements in vivo and on model

0554777 - ÚT 2023 CZ eng C - Conference Paper (international conference)
Horáček, Jaromír - Radolf, Vojtěch - Bula, Vítězslav - Košina, Jan - Geneid, A. - Laukkanen, A. M.
Estimation of damping in human vocal folds vibration: measurements in vivo and on model.
Dynamics of Machines and Mechanical Systems with Interactions, DYMAMESI 2022. Prague: Institute of Thermomechanics Academy of Sciences of the Czech Republic, v. v. i., 2022 - (Zolotarev, I.; Pešek, L.; Kozień, M.), s. 11-16. ISBN 978-80-87012-78-9.
[International colloquium DYMAMESI 2022. Prague (CZ), 01.03.2022-02.03.2022]
Institutional support: RVO:61388998
Keywords : phonation offset * high-speed videolaryngoscopy
OECD category: Acoustics

This study investigates the biomechanics of the end-part of phonation, i.e. the so-called phonation offset, experimentally. This information of vocal folds damping is important for testing and further development of mathematical modelling of phonation. The measurements of the damping ratio, based on high-speed videolaryngoscopic registrations, were realized in vivo on a male subject and in vitro using an originally developed silicon replica of the human vocal folds. In both cases the results show remarkable decrease of vibration frequency of the vocal folds and increase of damping ratio D in the phonation offset limiting to the values D=0.12 in vivo measurement and D=0.11 in vitro measurement. The results for vocal folds’ damping are in good agreement with previous measurements performed in humans using different methods.
Permanent Link: http://hdl.handle.net/11104/0331394