  In this paper we will study the asymptotic behaviour of the energy decay of a
transmission plate equation with locally distributed Kelvin-Voigt feedback.
Precisly, we shall prove that the energy decay at least logarithmically over
the time. The originality of this method comes from the fact that using a
Carleman estimate for a transmission second order system which will be derived
from the plate equation to establish a resolvent estimate which provide, by the
famous Burq's result [Bur98], the kind of decay mentionned above.
