Deafness

(def-nes). The condition of being deaf; surdity. D., Boilermakers', chronic labyrinthine deafne resulting from constant exposure to loud sounds. Bone-conduction is impaired, and there are destructive and atrophic changes throughout the cochleae, most marked at the base. D., Mind, See D., Psychic. D., Music, a variety of psychic deafne in which, although musical sounds are they are not recognized as such. D., Paradoxic, called also Paracousia Willi ii, deafne for speech in silence, but with ability, e. g., to hear the same voice in a noisy car or street. This is said to be caused by compre ion of the labyrinth. It is a form of otopiesis. D., Psychic, the deafne from struct i on of the auditory center (Munk). Souu heard, but not recognized or understood. D., Word, a variety of psychic deafne in which, although be heard, they are not comprehended.