Chest‐ and falsetto‐like oscillations in a two‐mass model of the vocal folds

The dynamics of the two‐mass model of the vocal fold oscillation is analyzed. It is shown that the oscillation may occur around two equilibrium positions, and that each case presents similar features as the chest and falsetto registers, suggesting a relation between them. The switch between equilibrium positions is caused by a transcritical bifurcation phenomenon.