I was worried about the same thing. There is a show here coming up I'd like to go to, but I was kind of worried about the volume. I'm sue it will be okay though.
It was also funny to try to look up any information on it, because all I could find was women saying things like "I'm pregnant, not dead!" as if the concern had anything to do with them having fun.
I was mostly looking for info on if I should be drumming, and (of course) that isn't out there, but based on the recommendation that if you use headphones on your stomach it's just supposed to be at a normal/comfortable volume, I am skipping drumming, which is sad.