There are five basic styles:
These aids are contained in a tiny case that fits partly or completely into the ear canal. They offer cosmetic and some listening advantages
Completely in-the-canal aids:
These hearing aids molded to fit deeply within the ear canal. They are the smallest and least visible type of hearing aid. Because they’re sheltered within the ear, it helps cut down on wind noise. CICs can help improve mild to moderate hearing loss in adults.
All parts of the aid are contained in a shell that fills in the outer part of the ear. These aids are larger than canal aids, and for some people may be easier to handle than smaller aids.
Most parts are contained in a small plastic case that rests behind the ear; the case is usually connected to either a custom ear-mold or a dome by a piece of clear tubing.
These aids are contained in a tiny case that fit deeply into the bony portion of the ear canal. It is the least visible hearing aid available.