Figure 1: A: Overview of the CI experience of the study patients before the preopABF was initially acitivated. With “[0, 1]” defining the naïve CI users, “[1, 2]” one months of CI experience, “[2, 3]” 2 months of CI experience and so on. While in this time of CI experience before preopABF the standard frequency allocation was activated. B: Overview of the PTA500-4k [dB HL] of the study patients