This document classifies and describes different types of hearing impairment: conductive (occurs in outer/middle ear), sensorineural (occurs in inner ear), mixed (combination of conductive and sensorineural), and central (in central auditory nervous system). It then provides examples of common disorders associated with hearing loss, including Crouzon's Syndrome, Waardenburg Syndrome, Usher Syndrome, Treacher Collins Syndrome, Pendred's Syndrome, Lyme Disease, Turner's Syndrome, and Pierre Robin Syndrome. Each disorder is briefly described in terms of inheritance, symptoms, and impact on hearing ability.