<prompt> Impedance audiometry is for pathology ofExternal earMiddle earMastoid air cellInner ear  <response>: It is done for the pathology of the middle ear. It is a test for conductive deafness. It is an objective test, widely used in clinical practice and is paicularly useful in children. It consists of: Tympanometry Acoustic reflex measurements. Ref: Dhingra; 6th Edition; pg no 24 