We don’t live in a quiet world, cars, equipment, alarms, fans, tv’s radios, etc. etc. etc. We have a very noisy Radio Frequency world as well. All sorts of electronic devices can add to the cacophony that is natural RF noise. In my shortwave listening I’ve “crusaded” against RF noise in the house where at all possible and had pretty good results. I mentioned in an earlier post about a couple of “random wire” antennas I’d setup and the one wrapped around the house picked up quite a bit of noise.