Sound is produced by the vocal cords. When expired air is passed through the true vocal cords under pressure from the lungs, the vocal cords are set into vibration which results in the production of sound.
Factors: The pitch of a sound is determined by the tension on the vocal cords-the greater the tension, the higher the pitch. The quality of voice depends on the resonators above the larynx, namely the pharynx, mouth and paranasal sinuses.
