Kind of a weird question, but I'm a bit insecure about this sort of thing... I own a 20g, 4G iPod with the standard earbuds, and I was wondering at what percentage (estimated, of course) of the maximum volume one can listen to music without the people in their immediate surrounding area hearing sound out of their headphones. I know this varies from situation to situation, so I'm concerned primarily with sitting in a classroom or library, standing in line at a store, walking on the sidewalk/standing at the intersection of two roads, and other similar scenarios one can encounter on a college campus. Perhaps some of you may say that I could answer my own question through simple experimentation, though some potential sources of error in that could stem from the fact that I would be aware that sound was coming out of the earbuds and would be actively seeking it. I'm a bit self-conscious and would like to avoid strange "turn that damn thing down!!" looks; hopefully you understand...