<unk> s are used for a variety of pathologies including sensorineural<unk>  loss, conductive<unk>  loss, and single-sided deafness.<unk>  candidacy is typically determined by a Doctor of Audiology, or a certified<unk>  specialist, who will also fit the device based on the nature and degree of the<unk>  loss being treated. The amount of benefit experienced by the user of the<unk>  is multi-factorial, depending on the type, severity, and etiology of the<unk>  loss, the technology and fitting of the device, and on the motivation, personality, lifestyle, and overall health of the user.<unk> s are incapable of truly correcting a<unk>  loss; they are an<unk>  to make sounds more audible. The most common form of<unk>  loss for which<unk> s are sought is sensorineural, resulting from damage to the<unk> ir cells and synapses of the cochlea and auditory nerve. Sensorineural<unk>  loss reduces the sensitivity to sound, which a<unk>  can partially accommodate by making sound louder. Other decrements in auditory perception caused by sensorineural<unk>  loss, such as abnormal spectral and temporal processing, and which may negatively affect speech perception, are more difficult to compensate for using digital signal processing and in some cases may be exacerbated by the use of amplification. Conductive<unk>  losses, which do not involve damage to the cochlea, tend to be better treated by<unk> s; the<unk>  is able to sufficiently amplify sound to account for the attenuation caused by the conductive component. Once the sound is able to reach the cochlea at normal or near-normal levels, the cochlea and auditory nerve are able to transmit signals to the brain normally. Common issues with<unk>  fitting and use are the occlusion effect, loudness recruitment, and understanding speech in noise. Once a common problem, feedback is generally now well-controlled through the use of feedback management algorithms.
Hearing aid
Vision therapy
Voice prosthesis
Craniofacial prosthesis
Vision rehabilitation
Visual prosthesis
Audio therapy
Aural rehabilitation