Computer simulation of mucosal waves on vibrating human vocal folds

摘要: Abstract A three-dimensional (3D) finite element (FE) fully parametric model of the human larynx based on computer tomografy measurements was developed and specially adapted for numerical simulation vocal folds vibrations with collisions. The complex consists folds, arytenoids, thyroid cricoid cartilages. fold tissue is modeled as a three layered transversal isotropic material composed cover, ligament muscle compared four where part cover substituted by liquid layer modelling superficial lamina propria. First, basic frequency-modal properties are presented given pretension folds. results oscillations excited prescribed intraglottal aerodynamic pressure then presented. computed in time domain show 3D motion all directions (horizontal, vertical anterior-posterior) mucosal waves clearly medial cross-section proper orthogonal decomposition (POD) analysis modes vibration shows that when taking account sub-layer inside propria like POD better agreement empirical eigenfunctions (EEF) obtained from performed excised larynges. Finally, usability pathological situations demonstrated considering nodule located upper cranial margin right fold.