Rinne positive: AC>BC. Remember 'SNAC-rip': in sensorineural loss and normal ears, air conduction is better-and means Rinne positive.
Rinne negative: BC>AC. This occurs with conductive deafness>20dB, or with severe sensorineural hearing loss (SNHL).
A false -ve Rinne: the cochlea of the other ear picks up the sound by bone conduction.
Use of a Barany noise box to mask the other ear during the test, prevents this.
OXFORD HANDBOOK OF CLINICAL MEDICINE