Watch the videos on the Ebtech product, since the vendor clearly explains the conditions under which that device won't help. There's no point in just buying one to try if the manufacturer has told you when it won't work! Not at eighty bucks, that is.

Edit: Unfortunately, the Hum X plugs directly into 120V Power, but the literature on it on their site does not mention "UL" at all. That suddenly gives me pause.