Development of self-oscillating human vocal folds prosthesis

0453090 - ÚT 2016 IN eng C - Conference Paper (international conference)
Horáček, Jaromír
Development of self-oscillating human vocal folds prosthesis.
Proceedings of ICOVP 2015. Guwahati: Indian Institute of Technology Guwahati, 2015 - (Dwivedy, S.; Tiwari, R.)
[ICOVP 2015 - International Conference on Vibration Problems /12./. Guwahati (IN), 14.12.2015-17.12.2015]
R&D Projects: GA ČR(CZ) GAP101/12/1306
Institutional support: RVO:61388998
Keywords : fluid-Structure Interaction * flutter * biomechanics of voice * modeling of Phonation
Subject RIV: BI - Acoustics

The study compares results of in vitro measurements of phonation characteristics performed on three types of developed 1:1 scaled artificial models of human vocal folds. The vocal folds made of silicon rubber were excited by airflow with synchronous measurement of the flow-induced vocal fold vibrations using a high speed camera, the subglottal dynamic and mean air pressures, the radiated sound and the impact stress between oscillating vocal folds during their collisions. The airflow coming from the model of trachea was increasing from the phonation threshold up to the airflow rate and subglottal pressure, which are in the range of physiologically relevant values in a normal human voice production. The measured phonation characteristics are in good agreement with the values found in human larynges. The knowledge of these characteristics for the vocal folds replica can be useful for experimental verification of developed sophisticated 3D computational finite element models of phonation due to relatively exactly defined input material and geometrical parameters, which is problematic to obtain reliably in humans. However, the main aim of the study is to contribute to the development of a voice prosthesis which could be used in humans after laryngectomy.
Permanent Link: http://hdl.handle.net/11104/0254465