What are the three parts that make up the normal voice?

The normal voice is produced through a complex process that involves three main systems: the respiratory system, the laryngeal system, and the supralaryngeal system.

The respiratory system provides the necessary airflow needed for voice production. It involves the lungs and the muscles of respiration, which generate air pressure that is essential for phonation.

The laryngeal system, which includes the vocal folds (or vocal cords), is where the actual sound is produced. When air from the respiratory system passes through the closed vocal folds, it causes them to vibrate, creating sound waves.

The supralaryngeal system encompasses the structures above the larynx, including the pharynx, oral cavity, and nasal cavity. This system plays a crucial role in shaping and modifying the sound produced by the larynx. It influences the quality of the voice by determining its resonance and articulation.

Together, these three systems work in harmony to create the rich and varied sounds that comprise normal human voice production.