Perhaps during nap time you can shift her to a room further away, close the door and turn on the air con, hopefully this can help to minimize the noise?
I think kids at this age (2-4) all behaves like that because they are more expressive and independent, give and take, it's part of the growing phase all child will go through.
If it really happens too late in the night, perhaps can just go over and ask nicely if they can keep it down. Sometimes people don't realized the noise can travel so far.