A type of hearing impairment caused by an abnormal functionality of the cochlear nerve with congenital onset. The phenotype is HP_0008527 (Congenital sensorineural hearing impairment). Also known as: Bilateral congenital sensorineural deafness, Congenital neurosensory deafness, Congenital perceptive deafness, Congenital sensorineural deafness, Congenital sensorineural hearing loss, Hearing loss, congenital sensorineural.