Medical Definition of Hearing aid
Hearing aid: An instrument to help in hearing. There are four common styles of hearing aids.
From largest to smallest, they are:
There is also a body hearing aid for very severe hearing loss. In general, hearing aids should ideally be binaural (in both ears), if the hearing loss involves both ears.
Last Editorial Review: 6/9/2016
Back to MedTerms online medical dictionary A-Z List
Need help identifying pills and medications?