Apparatus and method for reducing gear noise

The present invention relates to a device for reducing gear noise, wherein a drive gear (3a) of an electric machine (1) can be driven, and with an output gear (3b) is in meshing engagement, said drive gear (3a) and the driven gear (3b) respectively in a bearing (3d, 3e) are mounted, and a dynamic vibration signal by means of a sensor device (5) (SWS) is detected and the oscillation signal (SWS) includes a vibration compensation regulator (6) can be supplied, wherein (a control torque signal by means of the vibration compensation regulator (6) SDS) for generating a compensation torque (KD) is determined, wherein an electric motor (by means of the control torque signal (SDS) 1) is controllable, which (with the driving gear 3a) or the output gear (3b) for introducing compensation torque (KD) is connected wherein the sensor means (5) for receiving a vibration near a bearing (3d, 3e) at location r (3d, 3e) or in the bearing (3d, 3e) of the gears (3a, 3b) is present, furnished. Further, the invention provides a gear unit and a method for reducing gear noise concerns.