TIM VERNON, LTH NHS TRUST / SCIENCE PHOTO LIBRARY TIM VERNON, LTH NHS TRUST / SCIENCE PHOTO LIBRARY
Hearing aid. This small hearing aid sits just in the ear canal. Hearing aids improve hearing in people with partial deafness. Sound is picked up by a microphone, amplified and transmitted into the ear by speakers. Each aid is fine-tuned to amplify the range of frequencies most needed by the patient.
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