[The diagnosis of conductive hearing loss by tympanometry (author's transl)].

The use of electronic impedance measuring instruments to determine the acoustic impedance of the ear drum is very helpful in the diagnosis of middle ear diseases. Fluid filled middle ear spaces, otosclerosis and tympanosclerosis can be differentiated easily. In addition tube and facial nerve testing is possible. All tests can be done in less than 10 minutes for both ears.