Yes, and when you compare that with the US diplomats from Cuba. Seems if you play sounds outside of the human hearing range, very very loudly, it can hurt the person, severely. What other suggestions are possible, just out of the range of hearing, louder or softer as need be?
If I'm too close to symbols being hit by a drummer without ear protection, I start to feel sick. I need to have some sort of hearing protection so I don't feel bad when around people playing music.