http://www.digitaljournal.com/article/40542

More than 90 mins plugged-in music harmful

Posted Oct 18, 2006 by KeithLDick

http://www.sciam.com/article.cfm?chanID=sa003&articleID=F2617D00A4F462B47EE02E168AE3273B

Huh?, what you say I can't hear you!...
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"If a person exceeds that on one particular day and happens not to use their headphones for the rest of the week, they're at no higher risk," study author Brian Fligor told Reuters