There are a few types of the invisible hearing aid available to those who want a more "discreet" type of unit that allows them to hear without the "stigma" of wearing a hearing device.
Hearing aids that are considered invisible are units that are worn inside the ear or the ear canal itself.
These types of units require a doctor to fit it (because it has to fit based on the severity of your hearing loss, the size of the unit, and the shape of your ear).
Another type of hearing device that is considered invisible is the behind the ear unit.
These models are also fitted to your ear based on the shape of your ear and the level of your hearing loss.
These units are typically recommended to people with mild to moderate hearing loss.
The BTE (Behind The Ear) models are only actually visible if a person sees the tube that enters the ear from underneath.
The hearing models that fit into the canal itself are a little more "invisible".
These types of hearing units are used by people who suffer from moderate to severe hearing loss.
There are hearing models that don't fit into the canal but in the ear that are less invisible than the "in the canal" types but are still more invisible than your traditional hearing aid.
These types are also very effective for people with severe hearing loss.
One of the types of hearing units that are almost truly and completely invisible are hearing aids that fit completely in the ear canal These units fit even further into the ear than the types that merely fit into the canal.
These types are used by people with mild to moderate hearing loss.
One of the least talked about but still greatly effective invisible hearing aid is the personal sound amplifier.
Although not technically a "hearing aid" it still works by capturing and amplifying sound waves.
Some of these are designed to look like cell phone earpieces so people can see that you are wearing it but they never would be able to guess that it's hearing device.