A hearing device for use with a cochlear implant system configured to improve or augment a hearing capability of a user, comprising an input portion configured to receive, as a stimulus, an acoustic signal, to convert the acoustic signal into an electrical acoustic signal and to provide the electrical acoustic signal, a processing portion configured to process the electrical acoustic signal and to conduct an active grounding procedure, wherein the active grounding procedure relates to a scheme for grounding each electrode of the electrode array, an implant portion configured to be implantable at least partially in a cochlea of the user and comprising a plurality of operation electrodes (31-1 - 31-n) for electrically stimulating different frequency ranges, and a reference electrode part including at least one external electrode being grounded and implantable outside of the cochlea of the user, wherein the plurality of operation electrodes are driven by the processing portion on the basis of the electric acoustic signal, wherein the processing portion further comprises an electrode state setting section configured to set the plurality of operation electrodes into one of a high impedance state, a grounded state and a stimulating state in which a signal based on the electric acoustic signal is supplied to a stimulation electrode of the plurality of operation electrodes, and an electrode state setting pattern determining section configured to select, according to an operation mode of the cochlear implant system, one of a plurality of electrode state setting patterns such that a virtual electrode reaching parts of the cochlea not being covered by the electrode array is generated, wherein each of the electrode state setting patterns is adapted to enable a stimulation by a stimulation electrode of the plurality of operation electrodes being in a stimulating state and at least one of the plurality of operation electrodes being in a grounded state or in a high impedance state, where the high impedance state defines that an operation electrode of the plurality of operation electrodes is configured to stimulate with a current, and where the grounded state defines that an operation electrode of the plurality of operation electrodes is connected to a ground, and the operation electrode is used as a path for the current to flow from the stimulation electrode. wherein the electrode state setting section is further configured to cause setting of the plurality of operation electrodes into a specified electrode state of the high impedance state, the grounded state and the stimulating state according to the selected electrode state setting pattern. an input portion configured to receive, as a stimulus, an acoustic signal, to convert the acoustic signal into an electrical acoustic signal and to provide the electrical acoustic signal, a processing portion configured to process the electrical acoustic signal and to conduct an active grounding procedure, wherein the active grounding procedure relates to a scheme for grounding each electrode of the electrode array, an implant portion configured to be implantable at least partially in a cochlea of the user and comprising a plurality of operation electrodes (31-1 - 31-n) for electrically stimulating different frequency ranges, and a reference electrode part including at least one external electrode being grounded and implantable outside of the cochlea of the user, wherein the plurality of operation electrodes are driven by the processing portion on the basis of the electric acoustic signal, wherein the processing portion further comprises an electrode state setting section configured to set the plurality of operation electrodes into one of a high impedance state, a grounded state and a stimulating state in which a signal based on the electric acoustic signal is supplied to a stimulation electrode of the plurality of operation electrodes, and an electrode state setting pattern determining section configured to select, according to an operation mode of the cochlear implant system, one of a plurality of electrode state setting patterns such that a virtual electrode reaching parts of the cochlea not being covered by the electrode array is generated, wherein each of the electrode state setting patterns is adapted to enable a stimulation by a stimulation electrode of the plurality of operation electrodes being in a stimulating state and at least one of the plurality of operation electrodes being in a grounded state or in a high impedance state, where the high impedance state defines that an operation electrode of the plurality of operation electrodes is configured to stimulate with a current, and where the grounded state defines that an operation electrode of the plurality of operation electrodes is connected to a ground, and the operation electrode is used as a path for the current to flow from the stimulation electrode. wherein the electrode state setting section is further configured to cause setting of the plurality of operation electrodes into a specified electrode state of the high impedance state, the grounded state and the stimulating state according to the selected electrode state setting pattern.