What would cause me to hear a kind of sweeping noise in my head? It sounds like in my ears and the back of my head. Weird, huh? It sounds like someone is brushing off a very rough surface with a stiff brush or broom. It is not hearing my pulse or heartbeen, not rythymic at all. I've experienced this off and on for months, but lately it seems like I "hear" it every day, off and on throughout the day. Have not been able to determine any trigger for it escept that it seems to abate (not go away) when I am still, and increase a little bit when I am active. I have been having frequent headaches lately too. That may or may not be tied to this noise I hear. Any ideas about what this is, or what could cause it.