am i allowed to chew gum and listen to music during tournaments?

this might be a stupid question but during practice im allowed to chew gum and listen to music, my coach will only rarely tell me to take my airpods off. this makes me wonder whether im allowed to do this stuff at tournaments. im pretty sure already that chewing gum could be a choking hazard while fencing but i just want to clarify. but im not sure about music.

sorry if this is stupid but its a genuine question thats been on my mind