I believe there is a link between sound and dreams in terms of how the sound influences what dreams your having; but I don't know so much about sounds effecting whether you have dreams or not. I guess maybe if it is just a ridiculously obnoxious sound that truly annoys you, that may effect it....but even then, I don't know how. If you can get to sleep with such an obnoxious sound, you should dream. It doesn't effect the DMT being produced in your brain. The only way I can see it effecting dreams is if it prevents you from getting to sleep in the first place.