One embodiment of the present invention provides a computer system comprising a first node, adapted to be connected via at least a link to a second node. Said device comprises at least one distance sensor which is arranged on the wind energy installation and used for the non-contact measurement of the distance between the rotor blades and a pre-determined point on the wind energy installation. The hearing assistance device also includes an implant unit with a photovoltaic cell to receive the packages of light pulses and demodulate the packages of light pulses into electrical signals, and at least one active electrode that delivers the demodulated electrical signals to the cochlea.