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Cochlear Implants
how the implant works debate over implants hearing aid history essay
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A Scroll through Deaf History
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spacer ear trumpet spacer Hearing aids past and present have the same basic function: to increase the volume of sound for the impaired user. Before electricity, the only way to do that was to filter out other noise by directing the desired sound straight into the ear with some kind of tube or trumpet. Better yet, some of these hearing aids could even be used for self-defense! spacer
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