Stochastic resonance induced by fluctuation in liquid membrane oscillator without input signals

We investigated numerically the dynamic behavior of the oil/water liquid me mbrane, which is a promising model for excitable bio-membrane. When we use noise to modulate the parameters in simulation, noise-induced coherent osci llation is observed. With the increment of the noise intensity, the coheren ce of noise-induced oscillation can go through a maximum, which indicating the occurrence of stochastic resonance (SR) without input signals. We compa red the SR effects under the condition that noise is added to different con trol parameters. When noise was added to both of the parameters, a complica ted SR-like phenomemon was observed. The interaction of coherent SRs induce d by two independent noises is discussed. The possibly constructive role of noise in some sensory cells is discussed also. (C) 2001 Elsevier Science B .V. All rights reserved.