Rollover phenomenon in audiometry is seen in
Roll over phenomenon:- it is seen in retro cochlear hearing loss . With increase in intensity above paicular level phonetically balanced score (PB score) falls rather than maintain a plateau as in cochlear type of sensineural hearing loss .
Cochlear lesions
Retro-cochlear lesions
Lesion in inferior colliculus
Lesion in medial geniculate body
Ear