1)Behind the ear-Behind-the-ear aids have a plastic housing for the components which rests behind the ear. A clear plastic tube funnels amplified sound into an earmold in the ear canal. Hearing aids model, though developed decades ago, can be every bit as sophisticated as smaller hearing aids. In fact, it can hold more circuitry and amplify sounds to a greater degree than in-the-ear types. BTE aids can be more durable than other types and a few are even waterproof.
2)In the ear-In-the-ear aids house components in a custom-formed earmold that fits within the outer portion of the ear. Its size and easy-to-use controls also may be helpful for those with limited manual dexterity.
3)Disposable hearing aids-Disposable hearing aids are hearing aids that have a non-replaceable battery. These aids are designed to use power sparingly, so that the battery lasts longer than batteries used in traditional hearing aids. Disposable hearing aids are meant to remove the task of battery replacement and other maintenance chores (adjustment or cleanings). To date, two companies have brought disposable hearing aids to market: Songbird Hearing and Lyric.[citation needed] Both are digital, but are used in very different ways by the consumer. Songbird is a BTE hearing aid that is bought online and worn like any other BTE device. When it runs out, the user replaces it with a new one. Lyric is implanted deep in the ear canal by a professional. When it runs out, it must be removed and replaced with a new one by a professional.