Effects of poroelastic coefficients on normal vibration modes in vocal-fold tissues

2011 ◽  
Vol 129 (2) ◽  
pp. 934-943 ◽  
Author(s):  
Chao Tao ◽  
Xiaojun Liu
Keyword(s):  
Vocal Fold ◽  
Normal Vibration ◽  
Vibration Modes

Correlation of Microwave Dielectric Properties and Normal Vibration Modes of Ba(Mg1/3Ta2/3)O3-Series Materials

2004 ◽  
Vol 13 (1-3) ◽  
pp. 271-275 ◽  
Author(s):  
Yi-Chun Chen ◽  
Hsiu-Fung Cheng ◽  
Chia-Chi Lee ◽  
Chih-Ta Chia ◽  
Hsiang-Lin Liu ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Normal Vibration ◽  
Microwave Dielectric Properties ◽  
Vibration Modes ◽  
Microwave Dielectric

Airflow Characterization Combined With 3D Reconstruction of Rabbit Vocal Cord Based on In-Vivo Phonatory Experiments

2020 ◽  
Author(s):  
Zhipeng Lou ◽  
Junshi Wang ◽  
James J. Daniero ◽  
Haibo Dong ◽  
Jinxiang Xi
Keyword(s):  
3D Reconstruction ◽  
Vocal Cord ◽  
Vocal Fold ◽  
High Speed ◽  
3D Model ◽  
Vocal Folds ◽  
Computational Effort ◽  
Immersed Boundary ◽  
Vibration Modes

Abstract In this paper, a numerical approach combined with experiments is employed to characterize the airflow through the vocal cord. Rabbits are used to perform in vivo magnetic resonance imaging (MRI) experiments and the MRI scan data are directly imposed for the three-dimensional (3D) reconstruction of a 3D high-fidelity model. The vibration modes are observed via the in vivo high-speed videoendoscopy (HSVM) technique, and the time-dependent glottal height is evaluated dynamically for the validation of the 3D reconstruction model. 72 sets of rabbit in vivo high-speed recordings are evaluated to achieve the most common vibration mode. The reconstruction is mainly based on MRI data and the HSVM records are supporting and validate the 3D model. A sharp-interface immersed-boundary-method (IBM)-based compressible flow solver is employed to compute the airflow. The primary purpose of the computational effort is to characterize the influence of the vocal folds that applied to the airflow and the airflow-induced phonation. The vocal fold kinematics and the vibration modes are quantified and the vortex structures are analyzed under the influence of vocal folds. The results have shown significant effects of the vocal fold height on the vortex structure, vorticity and velocity. The reconstructed 3D model from this work helps to bring insight into further understanding of the rabbit phonation mechanism. The results provide potential improvement for diagnosis of human vocal fold dysfunction and phonation disorder.

Real actuator effects and the aerodynamic energy method

1988 ◽  
Vol 92 (912) ◽  
pp. 77-83 ◽  
Author(s):  
A. Simpson
Keyword(s):  
Energy Method ◽  
Normal Vibration ◽  
Control Law ◽  
Vibration Modes ◽  
Aerodynamic Forces ◽  
Flutter Suppression ◽  
Active Controls

Summary The aerodynamic energy method provides a means of flutter-suppression control-law design based wholly on oscillatory aerodynamic forces on a notional structure with notional normal vibration modes. The method has been proposed as a means of flutter suppression regardless of structural considerations, other than those mentioned. As originally conceived, the method is based upon the assumption of totally irreversible active controls. In this paper, the effects of finite impedance of actuators on the implementation of the method are investigated analytically. The conclusions do not augur well for the method.

Normal Vibration Modes of Stiff Strings

1968 ◽  
Vol 44 (4) ◽  
pp. 1093-1097 ◽  
Author(s):  
Dietrich Wolf ◽  
Helmut Müller
Keyword(s):  
Normal Vibration ◽  
Vibration Modes
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