Final answer:
The larynx, or the voice box, is the term related to the respiratory system that refers to the "voice box" for sound production.
Step-by-step explanation:
The larynx, or voice box, is the term related to the respiratory system that refers to the "voice box" for sound production. It is located between the pharynx and trachea. The larynx contains the vocal cords, which vibrate when air flows over them, producing sound.