Hearing loss is extremely common, especially in the elderly. The NIH estimates that 33% of older Americans, age 65 to 74, and nearly half of those 75 and older, have some hearing loss. There are many types of hearing loss and a variety of different causes, including genetic defects, infectious disease, and drug exposure. But the overwhelming majority of cases are due to exposure to loud noise. Several companies are developing therapies for hearing loss….
