American Hearing Research Foundation http://american-hearing.org/disorder...-hearing-loss/ noise-induced hearing loss (NIHL). American Hearing Research Foundation A normal conversation is 60 to 70 decibels damaged hair cells in the ear an alarming increase of hearing loss in teens http://american-hearing.org/disorder...-hearing-loss/ Noise-Induced Hearing Loss Noise-Induced Hearing Loss General information from American-Hearing damaged hair cells in the ear noise induced hearing loss most common causes of hearing loss in the U.S. American Hearing play their music too loud hearing loss pneumatic drill AHRF play their music too loud http://american-hearing.org/disorder...-hearing-loss/ American Hearing Research Foundation: NIHL less than 15 minutes Decibel Chart AHRF Noise Induced Hearing Loss Noise-induced hearing loss play their music too loud