Behind-the-ear (BTE) aids: Most parts are contained in a small plastic case that rests behind the ear; the case is connected to an earmold or an earpiece by a piece of clear tubing. This style is often chosen for young children because it can accommodate various earmold types, which need to be replaced as the child grows. Also, the BTE aids are easy to be cleaned and handled, and are relatively sturdy.
“Mini” BTE (or “on-the-ear”) aids: A new type of BTE aid called the mini BTE (or “on-the-ear”) aid. It also fits behind/on the ear, but is smaller. A very thin, almost invisible tube is used to connect the aid to the ear canal. Mini BTEs may have a comfortable ear piece for insertion (“open fit”), but may also use a traditional earmold. Mini BTEs allow not only reduced occlusion or “plugged up” sensations in the ear canal, but also increase comfort, reduce feedback and address cosmetic concerns for many users.
In-the-ear (ITE) aids: All parts of the hearing aid are contained in a shell that fills in the outer part of the ear. The ITE aids are larger than the in-the-canal and completely-in-the-canal aids (see below), and for some people may be easier to handle than smaller aids.
In-the-canal (ITC) aids and completely-in-the-canal (CIC) aids: These hearing aids are contained in tiny cases that fit partly or completely into the ear canal. They are the smallest hearing aids available and offer cosmetic and some listening advantages.