This type of hearing aid is in-ear, that is to say that it bears directly into the ear hole. Its shell is personalized since it is made from an impression taken from the ear of the patient, as some noise protection .
This kind of in ear hearing aids has the advantage of being less visible. However, its amplification efficiency is limited and is therefore not recommended for severe hearing loss (greater than 80 decibels ). It is also contributed for those who have a narrow ear canal, or for those with secretions of earwax important. In addition, its small size requires a certain agility of the fingers and makes it more fragile.