  We investigate the resonance type behaviour of an overdamped Brownian
particle in a bistable potential driven by external periodic signal. It has
been shown previously that the input energy pumped into the system by the
external drive shows resonance type behaviour as function of noise strength. We
further extend this idea to study the behaviour as function of frequency of the
external driving force and show the occurrence of similar nonmonotonic
behaviour, which can be ascribed as a signature of bona fide stochastic
resonance. Both weak and strong driving limit has been explored indicating the
occurrence of marginal supra-threshold stochastic resonance in a bistable
potential system.
