Definition & Meaning of "sousaphone"

What is a "sousaphone"?

A sousaphone is a large brass instrument designed to be worn around the player's body, making it ideal for marching bands. It has a circular shape with a wide bell that points forward, and it uses a set of valves to change pitch. The player produces sound by buzzing their lips into a mouthpiece, and the pitch is adjusted by pressing the valves. The sousaphone is known for its deep, resonant tone and is used to provide a strong bass foundation in outdoor performances and parades. Its design allows for easy carrying and playing while on the move.