It is predicted that by 2024 more than 30% of all people on Earth will have a hearing impairment. In terms of the frequency of diagnosed diseases of ENT organs in our country the second place is occupied by ear diseases - 31%, among which sensorineural hearing loss actually accounts for half of the cases - 49%. Today the number of people suffering from hearing impairment in Russia exceeds 13 million people, including over 1 million children and teenagers. Despite the fact that modern medicine has made significant progress in diagnosing and developing new methods of treatment of sensorineural hearing loss, the results often leave much to be desired.The etiology, pathogenesis, modern methods of diagnostics and treatment of patients with cochleovostibular disorders are analyzed in the monograph, the algorithm of diagnostics and treatment is developed, and recommendations for doctors are given.This monograph is intended for masters of otorhinolaryngology, clinical residents, and otorhinolaryngologists.