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Noise can radiate back down the appliances leads into the mains socket along the wires to other
appliances plugged into the mains such as radios and TV's.
Higher frequencies will radiate away from the appliance leads which then act as aerials these
interfere with TV sets.
Depending on the frequency of the noise emitted specific components are sometimes fitted
to reduce this noise and or eliminate it. In some cases it may require a brush grade change.
UpDated 20-03-2001