I went and asked my neighbor if he could try turning his TV volume down tonight. I got beaten up. Like I said, the guy's the size of a trucker; I didn't want to bother him, but I had to.
So far, I think the noises I've been recording are rats and my neighbor. I guess we'll see if anything different happens tonight. I'll look for rats tomorrow. If I find any, I'm going to the landlord.