Hyperacusis

**Definition:** An abnormally disproportionate increase in the sensation of loudness in response to auditory stimuli of normal volume. COCHLEAR DISEASES; VESTIBULOCOCHLEAR NERVE DISEASES; FACIAL NERVE DISEASES; STAPES SURGERY; and other disorders may be associated with this condition.

**Tree numbers:** - C09.218.458.505 - C10.597.751.418.505 - C23.888.592.763.393.505

**Synonyms:** - Loudness Perception Disturbances - Recruitment, Loudness - Loudness Recruitment - Hyperacusia