Abstract
Statistical observation was conducted on perceptive deafness in 3743 patients in the past ten years at the Department of Otolaryngology of Fujita Gakuen University Hospital. The sex ratio was in favor of males. (2290 males, 1453 females.). The peak age was in the fifties, and there was wide distribution around it. The type of hearing loss, most frequently found was the perceptive deafness which showed a decending type toward high pitch sounds. In terms of pathogenesis 40.8% was of unknown origin and 31.3% was account of old age.
