STOCHASTIC RESONANCE IN SYSTEM WITH ON-OFF INTERMITTENCY

Stochastic resonance in a chaotic threshold-crossing system exhibiting on-off intermittency and attractor bubbling: the logistic map with th e control parameter varying randomly or chaotically in time is studied in the case of weak additive and multiplicative periodic forcing. In both cases signal-to-noise ratio shows dependence on the forcing frequ ency; in the case of multiplicative forcing this dependence appears ev en for very small frequencies. It is shown that this is a result of a very long characteristic time scale, typical of systems with on-off in termittency.