No noise ever noticed on any frequencies from DC to daylight from our 35 years old GE induction cooktop.  Some broadband noise can be detected within a few feet of the cooktop but seems to have never made it to any outside antenna.  However GE appliances sure aren't' made like they use to be.   Just like most well established companies that once had a good reputation.  Actually GE appliances are now owned by Haier, a Chinese company.   If our induction cooktop dies before I do I'll sure buy another of some brand.

Dex