hearing aid

hearing aid

noun

Definition of HEARING AID

: an electronic device usually worn in or behind the ear of a hearing-impaired person for amplifying sound

First Known Use of HEARING AID

1922

Rhymes with HEARING AID

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hearing aid

noun \-ˌād\   (Medical Dictionary)

Medical Definition of HEARING AID

: an electronic device usually worn in or behind the ear of a hearing-impaired person for amplifying sound

hearing aid

noun    (Concise Encyclopedia)

Device that increases the loudness of sounds in the user's ear. Its principal components are a microphone, an amplifier, and an earphone. Hearing aids are increasingly smaller and less conspicuous, fitting behind the earlobe or within the ear canal. They have widely differing characteristics, amplifying different components of speech sounds for maximum comprehension by each wearer. Hearing aids with automatic volume control vary the amplification automatically with the input.