Conductive deafness results from a deficiency in the outer or middle ear. Sound information is blocked either in the outer ear, in most cases the external auditory canal or it can be in the middle ear i.e. the eardrum or the three ossicles. There may be a variety of causes preventing the sound signal from reaching the inner ear: blockage due to ear wax, foreign object, otitis, head injury... This type of deafness is always partial and never causes a significant loss of hearing. It may be enough, however, to considerably affect the social or professional life of the personal suffering from hearing loss. Conductive deafness can very often benefit from medical or surgical treatment. It is also possible, if this treatment fails, to remedy the hearing loss with a hearing aid used to amplify sound.