Ngekhebula lesignali nelokulawula kuma-elekthronikhi wezinhlelo zamakhompiyutha, okokusebenza kokulawula i-elekthronikhi, umshini wasehhovisi noma amayunithi okulawula inqubo, adinga ukuvikelwa ekuphazamisekeni kwe-electromagnetic (EMI) kanye nemisebe ye-electromagnetic (EMR).