 Flicker noise is found in carbon-composition resistors and in thick-film resistors, where it is referred to as "excess noise", since it increases the overall noise level above the thermal noise level, which is present in all resistors.In contrast, wire-wound resistors have the least amount of flicker noise.Since flicker noise is related to the level of DC, if the current is kept low, thermal noise will be the predominant effect in the resistor, and the type of resistor used may not affect noise levels, depending on the frequency window.