"Receiving various signals from the nervous system, the diaphragmatic muscles contract and the diaphragm moves downward. As the diaphragm depresses, it creates a vacuum in the lungs and air rushes in to fill that vacuum. During exhalation, the diaphragm relaxes and rises and lung volume decreases, creating a positive pressure difference, and air rushes out."
When the air comes out of the lungs, it goes through the trachea, and into the larynx. This in turn makes the vocal folds vibrate, the vibrations in the vocal folds alternately trap air and then release it. Each of these small releases of air goes into the pharynx. These puffs of air are the starts of of a sound wave. When the sound wave leaves the mouth, it then comes out as sound.
No comments:
Post a Comment