Noise Induced Hearing Loss is serious. Some 30 million people are at risk in the workplace, in recreational settings, and at home. In fact, it is the second most self reported work-related illness or injury. Already, 22 million American adults ages 20 to 69 have permanently damaged their hearing from exposure to loud sounds.
via Prevent Noise-Induced Hearing Loss: Have WISE EARS! for Life! [NIDCD Health Information].