Figure 8.
(a) The vibration amplitude ratio between the medial-lateral motion and the superior-inferior motion, evaluated at the middle point of the medial surface in the middle cross-section; (b) the medial-lateral vibration amplitude ratio between the lower and upper margins of the medial surface; (c) phonation threshold pressure; and (d) phonation onset frequency in the one-layer transversely isotropic model (●) and the two-layer transversely isotropic model (○: Gap,c = 1 kPa; ◻: Gap,c = 10 kPa; ◇: Gap,c = 20 kPa; △: Gap,c = 30 kPa).