We study the response of one- and two-dimensional excitable media to extern
al spatiotemporal noise in terms of synchronization. The media are modeled
by a finite-size lattice of locally coupled non-identical units of the Fitz
Hugh-Nagumo type driven by additive noise. We show that at nonzero noise le
vel the behavior of the system becomes extremely ordered which is manifeste
d by entrainment of the mean frequencies and by stochastic phase locking of
distant oscillators in the lattice.