Noise Induced Hearing Loss

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Audio 202 Audio and Acoustics Theory Audrey Chamberlain, 206043 Write a 1000 word report dicssning the causes and effects of Noise induced hearing loss (NIHL), the extent of the problem in out society ad how it can be prevented. As modern society continues to expand and our technology becomes more advanced, the problem of noise induced hearing loss is becoming more common. Noise induced hearing loss occurs when the ear is exposed to a sounds greater than 85 decibels, and the hair follicles deep inside the ear are damaged. The longer they are exposed to this level of decibels, the more damage is done. As the use of personal music devices is becoming more common, the population of people affected by noise induced hearing loss has dramatically increased. In recent studies, it has been shown that “16 percent of teenagers, or approximately 6 million children, suffer from permanent noise-induced hearing loss (NIHL)” (Cornelia Kean, 2010) .As there has been more study put into loss of hearing, there have been many new findings that can lead to prevention of this type of hearing loss. Noise induced hearing loss mainly effects the hairs that are found inside the cochlea, which over time effects the stereocilia, which if enough of these stereocilia are damaged or broken, hearing loss results. Any noise louder than 85 decibels can cause damage to not only the cochlea and the stereocilia, but the audio or hearing nerve also. As the sound passes through the pinna, into the ear cannel and is transferred into vibrations through 3 tiny bones called the ossocils , which send these vibrations to the cochlea. The hairs in the cochlea pick up these vibrations, which cause a nerve impulse that is sent to the brain and is interpreted as sound. If these hair follicles in the cochlea are damaged, they don’t grow back or repair themselves, resulting in hearing loss. Immediate

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