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Hearing aid

Illustration copyright 2005 Nucleus Communications, Inc. All rights reserved. http://www.nucleusinc.com

Hearing aids consist of:

  • A microphone, to pick up sound.
  • An amplifier, to make the sound louder.
  • A speaker, to deliver the sound into the ear.
  • Batteries, to power the hearing aid.
Primary Medical Reviewer Kathleen Romito, MD
- Family Medicine
Specialist Medical Reviewer Donald R. Mintz, MD
- Otolaryngology
Last Updated April 30, 2007

WebMD Medical Reference from Healthwise

Last Updated: April 30, 2007
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