ok, i moved into my new house a few months ago, and after being here just a few weeks, i noticed, in the dead of night, that i can hear/feel a repepitive vibration. its really hard to explain, but its like a kind of surge of electrical power (which should surely be silent- but i'm sure its electrical in origin). it makes a low persistent vuh-vuh-vuh-vuh sound. its very annoying and does not seem to be coming from any appliance. it is stronger in some rooms in the house, and i can still hear it with the electricity off... so , am thinking it could be environmental. yet when i go outside i cant hear it! wierdly, i can sometimes hear this noise when i'm in the car with the windows shut and engine off. could it be coming from the overhead electricity cables??
sorry if this sounds a bit mad, but am intrigued to know if anyone else has similar sensitivities! its not tinitus, btw, just incase you were wondering, lol!