ambient noise

The subtle but steady drone you hear while flying, for example, which makes it hard to hear clearly over cell phone communications. This term has morphed to mean any kind of background noise that actually makes it easier to focus on the task at hand (usually working in a cube farm on a computer). As in, "I personally listen to Gregorian monks chanting OM every night as ambient noise."

See also : digital doppelganger  
NetLingo Classification: Online Jargon