Figure 6: Total average (A+B)/2 (left panel) after 2,000 iterations and partial averages A(t) and B(t) after 1,000 iterations each (right panel). Click-evoked FAEPs of a normal hearing volunteer are shown (analog filter from 20 to 2,000 Hz, digital low pass filter with cut-off at 1,800 Hz). The two data sets represent the same recording. In contrast to the partial averages, the grand mean is not suitable for a well-founded as-sessment of the responses obtained at 20 and 10 dB HL. [22]