Sisi Test and Adaptation: I. Subjects with Normal Hearing

Abstract

The effect of the Actaptation of the ear upon the SISI test was studied in 26 normally hearing persons. The average Actaptation was found to be 4.2 dB at 250 Hz, 7.5 dB at 500 Hz and about 10 dB at higher frequencies after 3 min sustained stimulation. In the preadaptation test the average SISI test values ranged from 22.5% to 36.2%. In the post- Actaptation SISI test the average figures ranged from 30.8% to 48.7%. The dispersion of preadaptation SISI values was very large, which makes evaluation of the results difficult in a normal material, 15% showing positive results in Jerger's classification. Actaptation increased the positive values at higher frequencies, but changes to both directions occurred.