Basically when about to go to sleep, the moment I close my eyes, sometimes a few seconds after, I'll hear a sound. This happens rarely, but it's really weird when it does. Just last night I kept hearing a single high-pitched bark when I closed my eyes. It was really close, like it was next to me. I have dogs, but none that bark that high and they're kept outside. Once I fell asleep and had a dream that included a dog with the exact same bark; I realized that something in my subconscious that deals with dreams already probably had my dream "planned" and my brain may have been improperly registering that subconscious thought as actual sound; causing me to hear it when my mind started to slip into a sleeping state. I also remember a while back where the situation was similar, but instead it was a creaking gate. The thing is that I don't think I had a dream involving any gates, or if I did I forgot it instantly; which is possible. The sounds also doesn't repeat, it just happens once whenever I try to close my eyes that particular night it occurs. Of course it causes me to snap up every time it happens. So you can tell i have difficulty sleeping when it happens. So, what's up? Have you experienced something similar or heard of something like it?