I did some searches in this part of the forum and got some ideas but I am not sure if I targetted my issue. On the South side of our house, first floor I hear a deep strong vibrating humming noise coming from outside. It is an external wall, it has a window and our attic is above it. I searched the basement and there are no pipes, wires or gauges there. I looked in the unfinished attic space and don't see anything. The culprit, it appears is the drop line from the telephone pole to the house, it looks like some kind of loop and it was replaced new last year when we got FIOS from Verizon. There is no phone box on this wall (that is in the garage across the house) the wire runs in the basement across to it. Am I crazy? Can a little wire loop make this noise?