Aeorodynamic and Myoeslastic forces Essay Example | Topics and Well Written Essays - 500 words

Aeorodynamic and Myoeslastic forces - Essay Example â€Å"The glottis is the opening in the larynx that exists anteriorly (to the front) between the vocal folds and posteriorly (to the back) between the arytenoid cartilages. The part of the glottis between the vocal folds is known as the membranous glottis and the part of the glottis between the arytenoid cartilages is known as the cartilaginous glottis† {Mannel 2005] The function of the vocal folds in terms of closing and opening depends on the air pressure that is developed below and above the glottis. The glottal flow or glottal pulse remains zero when the phonation is in the closed phase, and the glottal pulse slowly increases during the opening phase of the phonation process. â€Å"The nature of phonation is such that the glottal pulses occurs as a series of pulses. The vibration has involves the pulse rate of the glottis with the additional function of the myoelastic and the aerodynamic forces. The combination of the elastic and the aerodynamic forces sets up as an oscillatory opening and closing of the glottis, causing what would otherwise be a steady air stream leaving lungs to be broken into a series of puffs of air many times per second †¦The sound that results form these puffs is called as phonation.†[Sherman Fitch III 1986]. The myolelastic and aerodynamic force initiates the vibration of the vocal folds. This aerodynamic forces initiates the vibrations of the tissues†. [Courey [2003]