When it comes to the selection of a hearing instrument, it is generally true that bigger is more powerful. While individuals with mild-to-moderate hearing loss will most likely find that in-the-canal instruments can adequately meet their needs, those with moderate-to-severe hearing loss are usually best served by larger, behind-the-ear instruments with greater power and capabilities. However, larger does not necessarily mean more intrusive. Unlike traditional behind-the-ear instruments, an “open fit” instrument is also worn behind the ear, but is smaller. Instead of housing the microphone, digital processor, battery, and speaker in one unit, open fit instruments use a thin tube to connect a tiny speaker to a smaller behind-the-ear housing. This design is less visible and affords greater comfort.
P.S. Because open fit hearing instruments do not require an ear mold, they provide a more natural hearing experience.