Figure 1.

(a) The geometric model of larynx. “LVF” represent left vocal fold and “RVF” represent the right vocal fold. The drawing is to scale and all dimensions are in centimeters. (b) View of the vocal-folds with a schematic of the two-mass model and the Lagrangian marker points corresponding to the vocal fold surface. k_i, r_i and d_i are the spring constant, damping constant and thickness of mass m_i (i=1,2), respectively and k_c is the stiffness of the coupling spring between two masses. (c) Zoom-in view of the glottis. Points “1l” and “1r” represent two bottom points on the left and right vocal folds respectively, while “2l” and “2r” represent the two corresponding points on the top.