my upstairs neighbors are really loud all day and even at night sometimes. they have 2 little kids. one of the kids runs and jumps around all the time. it sounds like the ceiling would come down. stuff on my entertainment center and computer desks are vibrating when he does it. he also screams alot. the parents stomping around, yelling at each other and the kids and they are slamming their doors and it sounds like they are dropping something heavy atleast once or twice a day. me and my husband talked to the manager of our apartment but she says that she wants a proof of them beeing loud and it also doesn't help that the manager is friends with my neighbors.i also called the police because of it but when they showed up the neighbors were all quiet. what can i do about this?