INTERACTION BETWEEN EXTERNAL AND INTERNAL NOISE SOURCES

Harmonic noise (also called quasimonochromatic noise) is used as an ex ternal stochastic source term in a non-Markovian oscillatory system wi th memory-damping. The stationary second moments are obtained by using the adjoint Fokker-Planck operator method. If the internal noise is h armonic then the occurrence of two maxima in the mean energy of the dr iven system seems to be obvious and depends on the seclected relations of the frequencies of the three oscillators. The effects of the frequ ency-dependent strength of the external harmonic noise on the resultin g energy and some generic cases like the interactions between internal harmonic noise and external white noise or exponentially correlated n oise have been investigated.