CIC (Completely in Canal)
This style of hearing aid is custom-molded to fit inside your ear canal. They are small and hide easily within the ear canal. Since they are small, however, they are limited in capability and can typically help with mild to moderate hearing loss in adults.
ITC (In the Canal)
An in-the-canal hearing aid is custom-molded and fits partly in the ear canal, but not as deeply as the completely-in-the-canal aid. This hearing aid can help with mild to moderate hearing loss in adults.
ITE (In the Ear)
An in-the-ear (full-shell) hearing aid is custom made and fills most of the bowl-shaped area of your outer ear. This style is helpful for people with mild to severe hearing loss.
BTE (Behind the Ear)
Behind the Ear hearing aids were introduced in the 1950s and are most often used to treat severe to profound hearing loss.