Most of the people with hearing loss can benefit from the use of hearing aids amplification. With the introduction of digital technology and advanced signal processing the outcome of hearing aid rehabilitation has improved significantly over the years. However to benefit from hearing aid amplification, the impaired ears are required to have some residue hearing to process the amplified sound and a minimum dynamic range of 30 to 40 dB is required to process speech information. As a result for patients with profound hearing impairment hearing aids may become inadequate. Patients with single sided deafness and those with chronic ear infections may also find little benefit from the use of conventional hearing aids.

Various implantable hearing solutions are now available for those patients who cannot obtain significant benefits from hearing aids.