DAGA 2010 - Deutsche Gesellschaft für Akustik eV

58 DAGA 2010 Programm
excised hemi-larynges were used and a modified measurement method
was applied for assessment of 3D elasticity data. To gather a complete
set of data, the mucosa was removed after a first set of measurement
to allow access to the underlying tissues in a second step. To ensure
repeatable measurements, the non-oscillating parts of the larynx were
casted in alginate and fixed within a stand that was constructed such
that the arytenoid cartilages could be adjusted arbitrarily with a defined
force. Measurement results and their impact on FE simulations are reported.
Di. 15:20 Gauß B 554 Stimmphysiologie
Transient Material Optimization of a Physical Multi-Layered Vocal
Fold Model
B. Schmidt a , M. Döllinger b , M. Kaltenbacher c und M. Stingl d
a Univ. Erlangen-Nürnberg, Department Mathematik; b Abteilung für Phoniatrie,
Universitätsklinikum Erlangen; c Alps-Adriatic University of Klagenfurt;
d Univ. Erlangen-Nürnberg, Lehrstuhl f. Angew. Mathematik II
Understanding the physical fundamentals of human voice is a challenging
and interdisciplinary task. The present work takes a closer look at a
physical model of the human larynx, in which the vocal folds are modeled
by multi-layered elastic bodies, i.e. silicon layers. In contrast to previous
work the dynamic behavior of the model is investigated.
We search for optimal material parameters, so that the movements of
surface of the multi-layer model match given vibration patterns as good
as possible regarded over a fixed period of time. These reference movements
may arise from hemilarynx experiments or may be extracted from
3D high speed camera data recorded during in-vivo experiments using
registration techniques.
For this purpose we employ an optimization concept based on a transient
finite-element simulation of the model in which the vocal folds are
considered linear-elastic bodies and we use an adapted material optimization
approach in order to identify optimal material parameters for each
layer by assuming isotropic or transversal-isotropic material properties.
We conclude this presentation by a series of experiments with a numerical
vocal fold model.
Di. 15:45 Gauß B 554 Stimmphysiologie
Parameteroptimierung im biomechanischen 3D-Mehr-Massen-Modell
A. Yang a , M. Stingl b , J. Lohscheller c , D. Voigt a , U. Eysholdt a und M.
Döllinger a
a Abteilung für Phoniatrie, Universitätsklinikum Erlangen; b Univ. Erlangen-Nürnberg,
Lehrstuhl f. Angew. Mathematik II; c Fachhochschule
Trier, Fachbereich Informatik
In der klinischen Diagnostik werden Stimmstörungen auf asymmetrische
Stimmlippenschwingungen zurückgeführt. Mittels einer endoskopischen