The Scare-actors in the houses will use loud noises to startle you, such as slamming doors shut loudly in your face, purposely slamming a metal object into another metal object to startle, to screaming in your face. Bill and Ted also uses pyrotechnics.
LOTS of loud explosions in Bill & Ted. I know very well because I have hyperracusis and am sensitive to that pitch. You don't get the same thing in the houses, although there are gunshot sounds outside of Havoc. They're not the right pitch to get to me, but be aware of them.