A hearing instrument should be small, comfortable, and discreet and still have a long durability. Today the hearing aid technology is very advanced, which makes all these criteria possible.
There are four mail types of hearing instruments:
This hearing instrument is housed in a small curved case, which fits behind the ear. The case behind the ear is attached to a custom earpiece molded to the shape of the users outer ear. However, some BTE instruments do not use custom earmold, instead a rubber tubing is inserted directly into the ear. The case behind the ear comes in different styles and patterns, typically it is flesh coloured. BTE hearing instruments also fit a wide range of haring losses from mild to profound loss.
In The Ear (ITE)
As the name implies this hearing instrument fits directly into the external ear. The circuitry is housed primarily in the concha (external) portion of the ear. The In-The-Ear instrument is typically for hearing losses ranging from mild to moderately-severe.
In The Canal (ITC)
Due to the miniaturisation of the component it is possible to make hearing component parts small enough to fill only a part of the concha. This instrument is custom made to fit your ear only. This style is appropriate for mild to moderate hearing losses.
Completely In the Canal (CIC)
Components can be small enough to fit deeply into the ear canal, therefore the model is limited in the number of programs and options. CIC are most appropriate for mild to moderate hearing losses.