A variety of factors can cause hearing loss. The most common causes include exposure to loud noises, the aging process, heredity, infection and more. There are two types of hearing loss. When something stops sounds from getting through the external or middle ear, it is called a conductive loss. Or, there may be a problem in the way the inner ear or hearing nerve works, a condition called a sensorineural loss (or “nerve type” loss). A mixed hearing loss includes both a conductive and a sensorineural hearing loss.