Last night I had an… interesting… experience. Two hours after I went to bed, I awoke from a dream that incorporated some sort of regular noise. (I don’t remember much of the dream, just the noise was counting or marking something.) As I came to, I realized the noise was coming from my room. If you’ve ever heard the guttural electronic beep/buzz that sounds before an emergency broadcast on the radio or TV, that’s the noise. The weird part is that I don’t have anything in my room that could possibly have been responsible for such a sound. I couldn’t localize the sound, and when I got out of bed to search for its source, it stopped. I thought maybe it was just some sort of auditory hallucination, but when I got back in bed, it started again—not right away, but as I got close to sleep. I sat up and it stopped. It wasn’t regular this time, but intermittent. I couldn’t get back to sleep with that going on—not to mention the fact that it was starting to weird me out—so I moved into another room and closed my bedroom door. I heard the sound once before falling asleep again. It was a bit quieter than before, but too loud to account for the door being closed. I was in and out of light sleep every few hours for the rest of the night. Has anyone experienced something similar? Any ideas what could have caused the noise?