Alright, so I have terrible performance problems with Fallout: New Vegas, but after a Month or so of tweaking, I got the game to work. So, I started the game, and at about level 5, I returned to Goodsprings to do the quest with the Powder Gangers in Goodsprings. After the gunfight, it was about 5pm and I sold some stuff at the General Store, then headed for the cemetary that I hadn't looted yet. I dug up one grave, then I thought I heard something. I drew my service rifle, and stopped. There was a faint whispering that was really strange - but I couldn't see anything that could be making the noise. I thought maybe it was ghouls...but they aren't near Goodsprings, nor did they make the sound. I dug up another. The sound stopped. I walked around a bit, and the sound ONLY plays at the center area of the graveyard. When you draw nearer to your dug up shallow grave, it gets slightly louder.
After doing a short Google of the subject, I got nothing about this. It might just be an Ambient Sound marker placed in the cemetary, but I don't know anywhere else in the game that has this, it also REALLY freaks me out.
I think you people should try this.