Ask the patient – which ear hears the sound louder?.Place the foot piece or base of the vibrating tuning fork on either of midline of vertex, forehead, chin or upper incisor teeth.This is because the conduction problem masks the ambient noise of the room, whilst the well-functioning inner ear picks the sound up via the bones of the skull causing it to be perceived as a louder sound than in the unaffected ear.
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Principle: This test is useful in identifying unilateral hearing loss. A patient with a unilateral conductive hearing loss (CHL) would hear the tuning fork loudest in the affected ear. Weber test is lateralized to better ear.Masking opposite ear with Barany’s noise box to prevent transcranial transmission of sound.On application of vibrating tuning fork to deaf side the sound is transmitted to the non-test ear by bone and patient perceives this bone conduction and presumes that it is perceived by test ear, thus interpreting it as BC > AC.Īssociated conditions: Congenital causes, Skull fracture, Meningitis, Mumps, Acoustic neuroma This is seen when a patient has severe SNHL on test side and normal hearing on non-test side. Test of duration should be performed to confirm. Note: Sometimes, in testing for loudness AC = BC can be noted and this may indicate mild CHL.
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