Deafness can be divided into which categories according to the site of the lesion?

Hello, if it is according to the lesion site and nature can be divided into four categories:

(a) conductive deafness: the outer ear, the middle ear sound transmitting structure lesions (b) sensorineural deafness: refers to the cochlea helix lesions can not be the sound wave into the nerve excitation or nerve and its central pathway obstacles can not be the nerve excitation into the (c) mixed deafness: the sound transmitting and sound-sensing structures at the same time lesions caused by the auditory (c) Mixed deafness: hearing impairment caused by lesions of both sound transmitting and sound-sensing structures. (D) central deafness central deafness is located in the brainstem and brain, involving the cochlear nerve nucleus and its central conduction pathway, the auditory cortex center leads to central deafness.