Flow-structure-acoustic interaction in a prestressed human larynx model

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Details zur Publikation

Autorinnen und Autoren: Kniesburges S, Becker S, Delgado A, Döllinger M
Titel Sammelwerk: IFMBE Proceedings
Jahr der Veröffentlichung: 2009
Band: 25
Tagungsband: IFMBE Proceedings
Seitenbereich: 603-606
ISBN: 978-3-642-03894-5
ISSN: 1680-0737


Abstract

For investigating the fluid-structure-acoustic coupled (FSA) process of human phonation, synthetic models of the vocal folds (VF) were designed which showed flow-induced oscillations and the sound production process. The models were developed to analyse the flow-induced vibration depending on the prestress similar to human vocal folds. They consisted of a silicon rubber whose Young's moduli corresponds to those found in human vocal folds between 3 and 13.2 kPa. The major aim of this work was to to observe the whole FSA process and to determine the acoustic sources. Therefore two approaches were applied: Firstly the vibration of the VFs was recorded using a high-speed camera triggered by the subglottal pressure to determine the phase shift between the two signals. Secondly synchronous measurements of the subglottal pressure, the flow velocity behind the VFs and the acoustic pressure were performed. In all investigations the influence of tension and stiffness of the VFs were analysed. The results shows that the vibration frequency and the phase shift between the subglottal pressure and the glottal width depended on different boundary conditions. The synchronous measurements determined the pressure fluctuations of the pulsating flow rate as main acoustic source.


FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Becker, Stefan apl. Prof. Dr.
Lehrstuhl für Prozessmaschinen und Anlagentechnik
Delgado, Antonio Prof. Dr.-Ing.
Lehrstuhl für Strömungsmechanik
Döllinger, Michael Prof. Dr.
Professur für Computational Medicine (DFG-Forschungsprofessur)
Kniesburges, Stefan PD Dr.-Ing.
Lehrstuhl für Prozessmaschinen und Anlagentechnik


Zitierweisen

APA:
Kniesburges, S., Becker, S., Delgado, A., & Döllinger, M. (2009). Flow-structure-acoustic interaction in a prestressed human larynx model. In IFMBE Proceedings (pp. 603-606). München.

MLA:
Kniesburges, Stefan, et al. "Flow-structure-acoustic interaction in a prestressed human larynx model." Proceedings of the World Congress on Medical Physics and Biomedical Engineering: Image Processing, Biosignal Processing, Modelling and Simulation, Biomechanics, München 2009. 603-606.

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