The pharynx is the main resonating vocal chamber for you voice. It is commonly called the throat. The pharynx is a passageway (a muscular tube) starting from the back of you nose down into the neck, to the sixth cervical vertebra. It serves both nasal cavity and the oral cavity for air as the singer performs. There are three parts to the pharynx: the nasopharynx (upper part of the throat), the oropharynx (back of the mouth) , and the hypopharynx (between the oropharynx and the esophageal inlet).
The pharynx amplifies the sound waves when you sing. The sound waves are produced, by the vibrating of the vocal folds (cords) in the larynx.
In an effort to create more space when you are singing, the pharyngeal space is increased (open throat) to maximize the resonating space in the vocal tract.
Opening the pharynx (throat) is intended to promote a type of vocal release in the throat that helps singers avoid constriction and tension while they sing. This produces a balanced and evenness, helping you sing smoothly from one register to another. Listen to Lexie Torres singing "Skyfall" as she transitions smoothly through registers without any shift in her voice.
JOKE FOR THE DAY:
Mom, why do you always stand by the window when I practice for my singing lessons? I don’t want the neighbors to think I’m employing corporal punishment, dear.