I had a neighbor who mounted his TV directly on the shared wall to my bedroom in violation of the lease terms. The wall was hollow and seemed to not only conduct the sound into my bedroom but act as a natural amplifier. I offered him a nice speaker system I wasn't using but he said he didn't know how to connect it to the TV. I offered to do it for him but he refused. I offered to pay a professional and he still refused. I was forced to move my bed into the living room so I could sleep through the night as he started his day by watching the news at full blast at 3am.

Naturally, in response I propped those speakers to the same wall and played whale calls at a low volume any time I wasn't home.