I keep hearing the dungeon cleared noise when I'm wandering about roads outside of Skyrim, not actually clearing anything... just walking down a road... any idea what causes this? Is it common? My game isn't really modified (Moonpath, some armour and weapons mods, and a house mod)...

There is a "dungeon cleared" noise? What I frequently hear is the noise of things falling on the floor from the sky and when I watch there's nothing.