Directional vibrations are required for many vibrating processes. These are usually generated by two parallel-mounted, contra-rotating oscillation motors. Under certain circumstances, the synchronization of the two motors does not always work properly. In the start-up phase, the vibration system has to be able to vibrate freely in at least two axes. This is not the case, for example, with forced guidance. The oscillating converters in conjunction with standard vibration motors offer a cost-efficient alternative here. Both devices are simply screwed together. The mode of operation corresponds to that of an oscillating vibrator, but with the advantage of a broad, finely stepped performance spectrum.