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Two component susceptance-conductance tympanometry at a probe tone frequency of 660 Hz is superior to admittance tympanometry at 220 Hz for the detection of an ossicular discontinuity, a luxation or a necrosis. It is, however, essential to understand well the difference between non-pathological W-patterns and pathological broad multi-extrema tympanograms. The systematics of normal W-patterns is reviewed and the influence of the sign and magnitude of the pumpspeed on the shape of both types of tympanograms is discussed.
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