Figure 4
From: Adaptive stochastic resonance for unknown and variable input signals
Performance of the output autocorrelation method. Comparison of resonance curves using the mutual information (red) and the output autocorrelation (blue) for different continuous signals. (a) Projection of the 3-dimensional Roessler attractor in one dimension, asymmetric threshold. (b) Ornstein-Uhlenbeck process, symmetric threshold. (c) Wave files of recorded speech, music and natural sounds, symmetric threshold. The biologically important case of the leaky integrate-and-fire model is shown in (d) with sine wave with constant frequency and amplitude as input. The signal-to-threshold distance was 0.1 for all cases.
