Try searching "Buzzing noise during dreaming" in google. I really feel bad for you because you're experiencing these buzzings. It may be life-threatning. Hope you find an answer to this bizarre disease/syndrome. I dont know which it is. :I Anyways, good luck.
If that does not help, goto a expert doctor. This disease/syndrome may be very rare. I think a parasite in your brain is causing this. I dont know. If it is, it may be growing every minute if it is a parasite. Or something is wrong with your brain. I forgot what that part was, but it moniters sleeping. Maybe something is wrong with that.