Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Hearing impairment. Sensorineural hearing loss, Noise-induced hearing loss, Post-lingual deafness, Deaf culture, Otosclerosis, Unilateral hearing loss, Hearing aid, Auditory brainstem response, Auditory processing disorder, Hearing loss with craniofacial syndromes, Models of deafness, Tinnitus