I was looking for EMIs with a RTL-SDR dongle and a small copper wire (10 cm.) in my room, and was very unpleasant found that the podcast I was listening in my laptop has been transmitted (poorly, but transmitted) in AM. And the signal goes stronger if the speakers are loud.
I am talking about «normal» speakers. No wifi, no bluetooth, and of course no radio involved. The distance between the EMI source and the antenna was about 3 meters, and I have tested with another computer, from another room. The results are the same. Shocking.