Single sided hearing loss is possible, but not common. The vast majority of people with hearing loss have a loss in both ears (bilateral loss), but one ear might have greater damage, or you learn to favor one ear as your hearing deteriorates. True unilateral hearing loss may be caused by:
• Congenital or genetics
• Illness or infection
• Head or ear trauma
Single-sided deafness (SSD) is when hearing loss in one ear is so severe that a conventional hearing aid will not help, but there are specific hearing aids that may help route sounds from the poor ear over to the good ear using Bluetooth technology.