A two-mass model of the vocal cords: Determination of control parameters and their respective consequences

A two-mass model of the vocal cords is controlled by physiological control parameters : subglottal pressure, mass and stiffness of the vocal cords. Their values, specified in the frame of this study, are investigated by an indirect method and a statistical proceeding. Several kinds of models are considered. Each of them can give, with different stiffness, a right shape corresponding to the volume velocity signal. A simplified control is proposed. The characteristics of the glottal flow (waveform, duty ratio, frequency, intensity) are specified according to the control parameters. Results show that the two-mass model, with the proposed control parameters, duplicates principal features of cord behavior in the human.