500
How do the vocal folds work and what is their role in articulation?
They sit in the larynx, can open and close the trachea. When they are open, a speaker can produce voiceless consonants or simply breathe, when they are tightly closed, voiced sounds can be produced. This is achieved via the airstream that is stopped by the vocal folds, then becomes strong enough to force the vocal folds apart, which then quickly close again. This is repeated many times and a vibration evolves that is passed on to the air, eventually producing voiced sounds.