A mechanoreceptor cell of the auditory or vestibular system that is sensitive to auditory stimuli. The accessory sensory structures are arranged so that appropriate stimuli cause movement of the hair-like projections (stereocilia and kinocilia) which relay the information centrally in the nervous system. [ MESH:D006198 https://en.wikipedia.org/w/index.php?title=Hair_cell&oldid=1045345915 ]