I have an E-LVT that puts out a strong enough EMF that I can hear it in my car radio when I take a
vape. It doesn't appear to be frequency dependent so I'm guessing the signal is getting picked up after the tuning stage of the radio. The buzzing sound I hear would indicate I'm hearing the P.W.M. from the E-LVT.
As far a other sources of EMF are concerned, if it's digital it has some EMF from the fact that there is a clock circuit in it, that's just how digital electronics works.