Fig. 3.

Average N1 (a) and P2 (b) amplitudes as a function of magnitude of the frequency change (n = 12). Downward frequency changes are presented on the left (indicated with negative values) and upward changes on the right. Purple lines indicate the sweeps of 85 oct/s, red lines of 28 oct/s, green lines of 9.5 oct/s, and the blue lines of 3.2 oct/s. Error bars indicate standard errors of the mean