has part has part characteristic of part of inheres in part of has modifier sensory perception of sound Hearing abnormality HP:0000364 According to the World Health Organization, deafness refers to the complete loss of hearing ability in one or two ears. Hearing impairment refers to both complete and partial loss of the ability to hear. UMLS:C4025860 Abnormal hearing Hearing abnormality An abnormality of the sensory perception of sound. Abnormal ear physiology quality abnormal