I don't know if Bungie still talks about Halo, but what's been bugging me for years is the back round noise you here when your in the lobby in matchmaking in Halo 3 and Reach. Its a distinct humming noise and I really want to know what it is or if it even has a sound file to it. I usually can hear it more clearly if I find a match and quickly exit out back into the matchmaking menus. The sound would still be playing can either Bungie or people of the community help me find this sound? (Relevant and appropriate answers please)