[en] We explore the voltage noise properties arising from magnetic vortex motion disturbed by both thermal fluctuation and random impurities. On the basis of a Langevin dynamics simulation of the two-dimensional vortex dynamics driven by a transport current in random media, we discuss the relationship between the voltage noise properties and the vortex motion. In particular, it is demonstrated that 1/f noise power spectra appear in the plastic flow region of the current-voltage characteristics, where an intermittent behaviour of the vortex dynamics is observed with a large noise amplitude. (author). Letter-to-the-editor