phonation

noun

1. (countable, uncountable)The process of producing vocal sound by the vibration of the vocal folds that is in turn modified by the resonance of the vocal tract.

   “Phonation. The voice is produced when the closed, taut vocal folds in the position of phonation are opened and made to vibrate by an air stream expelled from the lungs, causing sound waves to be produced. The volume of sound depends on the force of the air stream, and the pitch is determined by the frequency of vibration. The latter depends on the length (sex and age differences), tension and thickness of the vocal cords, as in the strings of a musical instrument.”

   “Sound generation in the larynx is termed phonation, and phonation types (sometimes called voice qualities) are recognisably different kinds of vocal fold vibration. All languages use a phonation type called normal or modal voice as the basis for all speech.”

   “When the vocal folds are adducted (closed) somewhat gently, then a certain amount of air pressure from the lungs below (subglottal pressure) can set the folds into a self-sustaining oscillation. This condition is called phonation or voicing; and it involves a delicate balance of tissue coupling forces and aerodynamic forces whose overall description is still a current research topic […]”