Deafness and hearing loss

Deafness and hearing loss remain a public health problem for a variety of reasons. In fact, a person is said to be hard of hearing if he or she cannot hear at sound levels equal to or greater than 20 dB in both ears. The deficiency may affect one or both ears. Deafness and hearing loss can be congenital or due to noise-induced hearing loss, or linked to age and/or ototoxic drugs that damage the inner ear.