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Noise and hearing - children and teenagers The inner ear (cochlea) contains tiny cells that are sensitive to sound (hair cells). These cells convert the vibration of sound into messages to the brain. After long exposure to very loud noise, physical changes occur to several parts of the inner ear, including the hair cells. If the ear is rested for a few days, most of the hair cells recover, but there can be permanent damage. As people get older the hair cells get damaged too. After damage, the person may have difficulty in picking speech out from background noise even before testing of...

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