Noise-induced coherence resonance, an effect akin to the well-known ph
enomenon of stochastic resonance, has been described recently for exci
table systems driven by white noise. The purpose of this Letter is to
show that coherence enhancement in a system of this kind can also be a
chieved by modifying the correlation time of the noise. (C) 1997 Elsev
ier Science B.V.