Comment on “Stochastic resonance in a linear system with signal-modulated noise” by L. Cao and D. J. Wu

The system discussed recently by Cao and Wu in Europhys. Lett., 61 (2003) 593, merely reproduces properties of the input signal.

[1]  H. Hees,et al.  Statistical Physics , 2004 .

[2]  John K. Tomfohr,et al.  Lecture Notes on Physics , 1879, Nature.