It has been demonstrated experimentally that noise can play an important role for signal encoding in central neurons as well as in sensory receptors[1].As noise can enter a neuron in different ways[2], we have used mathematical and biophysical approaches to compare the effects of the most widely used noise implementations: current noise and conductance noise.The studies were done on a HH-type cold receptor model which can generate a variety of physiologically important impulse patterns upon temperature scaling[3].