Last night I was scanning the Military Air bands and there were tons of these tones coming through. I have no idea what these might be so any clue regarding the sounds would be cool.
Weird Radio Noises: Weird Radio Noises - YouTube
You're going to get a lot of noise in that band, mainly just because it covers so much area, that the odds are just higher for something interfering somewhere. Also, there's a couple little chunks that are set aside for consumer telemetry stuff, like door-openers, sprinkler timers and what-not. You can usually ID those, because they will sound like little sets of chirps for a few seconds. That's somebody opening their garage or whatever.