What should be the loss of hearing at least for weber's test to lateralise: (A) 5 db, (B) 10 db, (C) 15 db, (D) 20 db
Answer is D. Lateralisation of sound in Weber test with a tuning fork of 512Hz implies a conductive loss of 15-25 dB in the ipsilateral ear or an SNHL in the contralateral ear. Ref: Dhingra; 6th Edition; pg no 22