Hearing radio transmissions at night?

First, I want to say, I am sane, thank you very much. Its just recently, I've been picking up bits of radio broadcasts at night when I'm in bed. It's usually sort of muffled talk shows, but sometimes sports; both men and women. One time I heard an audience responding. I heard intro music once and a couple of times, I could actually catch a word spoken loud enough to understand. There are so many "waves" in the atmosphere these days, especially since they introduced digital TV and the pay radio stations. It's not coming from inside my head (like my fillings). I can put my fingers in my ears and it stops. It only happens once a night or less. Anybody else experience this?

I'm not joking...not cute answers please.