1. The lungs play an important role in the production of the human volce, 2. Because of the vibrations of the vocal folds, sound is produced. not affect 3. Irregular breathing does voice production. 4 The vocal tract includes the neck, mouth, and nose. 5. The larynx is located below the lungs, 6. Air goes to the lungs through the nose and mouth. 7. As we breathe out, air goes out of our body 8. The size of the cavities in the vocal tract does not affect the human volce production