Myoelastic-aerodynamic process

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The myoelastic-aerodynamic process , sometimes also the myoelastic-aerodynamic theory , explains the processes of phonation in the human larynx . Phonation is the process by which voiced sounds are produced by vibrating the vocal folds . The phonation cycle (i.e. the oscillation of the vocal folds) is described by means of the myoelastic-aerodynamic process. At the beginning of the cycle , the vocal folds are in a slightly tense state. The glottis, i.e. the opening between the vocal folds through which the air flows when speaking is closed. A pressure builds up below the glottis (subglottal) which, if it is high enough, opens the glottis. An air flow is created. Since the glottic cross-section is smaller than the cross-section above and below the larynx, the speed of the airflow increases. Bernoulli forces arise , which increase the restoring forces of the vocal folds. Since the Bernoulli forces together with the restoring force exceed the force of the subglottal pressure, the glottis closes and the cycle begins again.