When a patient is totally deaf in just one ear (normal hearing on the other side), there are only a few options to help. BAHA - Bone Anchored Hearing Aid CROS Hearing Aid - Stands for C ontralateral R outing O f S ignals. With BAHA, it does require surgery given the hearing aid is literally mounted on a post that is directly drilled into the skull on the deaf ear side. Total cost about $10,000. With CROS, two hearing aids are required; one on the deaf hear which picks up sound, …