Ringer for OS X Sets Just the Right RingtoneTone overlap syndrome can be a stressful affliction, and it seems to affect iPhone users on a regular basis. It's a phenomenon in which someone with whom you live or work has the same kind of phone you do and they use one or more of the same built-in tones you use on yours. Left unchecked, tone overlap can lead to annoyance, acute irritation, and eventually madness.
http://ectnews.com.feedsportal.com/c/34520/f/632003/s/20090244/l/0L0Smacnewsworld0N0Crsstory0C752850Bhtml/story01.htm
