What should be the least hearing loss for Weber test to lateralize?: (A) 5 dB, (B) 10 dB, (C) 15 dB, (D) 20 dB
Answer is A. In normal Individuals - No lateralization of sound occurs as Bone conduction of both ears in normal and equal. In conductive deafness - Lateralization of sound occurs to the diseased ear. In SNHL - Lateralization of sound occurs to the better ear. Webers is a very sensitive test and even less than 5 dB difference in 2 ears hearing level can be indicated.