If your teen can’t carry on a conversation with her music blaring in her ear, then its loud enough to cause hearing damage!
According to a survey of Ontario high school kids 30% of students listen to their MP3 players at level of 91 decibels (that is a sound equal to a revving motorbike) or maybe even higher for an average of almost 3 hours a day. Can you imagine what that is doing to their hearing! Gael Hannan, a manager of programs at the Hearing Foundation of Canada comments that at these decibel levels these listening habits can cause permanent and irreversible hearing loss.
So what is a healthy level? Apparently it is safe to listen at a level of about 85 decibels (noise equalivant to a busy resturant) for up to 8 hours a day. For every 3 decibel increase in sound level cut listening time in half.
Except from Canadaliving.com