User Guide

Volume levels are measured in decibels (dB). Exposing your ears to any noise

at or above 85 dB can cause gradual hearing loss.

According to the Occupational Safety and Health Administration (OSHA),

listening to volume levels over 100 dB for more than two hours at a time can

lead to hearing loss.

http://www.osha.gov/SLTC/noisehearingconservation/#loud