[Frequency dependence of the SISI test.(short increment sensitivity index). Clinical examples]

Experimental data on the influence of test frequency on the SISI-score are controversial. Comparability is limited by the diversity of experimental conditions. In a series of cases of pancochlear sudden hearing loss SISI-scores at 0.5 kHz and 3 kHz were compared. Some examples show that the sensitivity of the SISI-test at 0.5 kHz is much lower to that at 3 kHz. Low SISI-scores, of little evidence per se, have to be considered very critically in the low pitch range.