I have dealt with it by installing a solid door at the end of the hallway.
Read the comments on SuperUser. He's a single dad. Being unable to hear what your 4 year old kids are up to is a bad idea when there's no one else to monitor them.
Read the comments on SuperUser. He's a single dad. Being unable to hear what your 4 year old kids are up to is a bad idea when there's no one else to monitor them.