Question

Air is not useful for the sense of hearing.
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Answer 1

$\red {\tt {\huge {Answer}}}$

Air conduction hearing aids will likely be the first choice for most people who have hearing loss. They amplify sound by delivering the output of the hearing aid into the ear canal. These hearing aids come in a variety of styles with a wide range of features.

$\bold \purple{@Bobo31}$