Close to six million American teenagers have some form of hearing loss, which has increased by a third over the past two decades. Marching band contributes to this issue, as instrument noise levels regularly exceed 85 dB, the threshold for potential hearing damage. A drumline rehearsal exposed students to 99 dB over 30 minutes. Rehearsals indoors are particularly dangerous if volume is not reduced. Protecting hearing requires musicians' earplugs, shorter rehearsal sessions, and awareness of lowering volume indoors. A collaborative effort between students, leaders, and parents is needed.