The best pedal I own does get rid of hum... from anything..
I have a tv , cells, wireless connections.. lamps, lights etc etc.. and this kills it all..
including leaving those noisy pedals on..
they are silent till needed.
while not taking away from the sound when needed.
a wonderful item, well worth every dollar...
Boss NS-2
http://www.thefret.net/showthread.php?t=3589
http://www.zzounds.com/item--BOSNS2