Phonation is the effect of the larynx on the airstream produced by the lungs and diaphragm, creating an audible source of acoustic energy which is then modified by the articulation of the rest of the vocal tract. It is a primary component of voice quality. For example, voiced phonation takes place when the vocal folds are brought together and breath pressure causes them to vibrate in such a way that a buzzing sound occurs; this vibration is the source of acoustic energy which is then modified by… (More on Phonation)