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As I am a Licenced Commercial General Contractor and have a few pieces of tracked equipment, I know what building or construction sounds like for sure even to the point I can get close to saying what is being done. It sounded like a Harleys blasting off in the distance but he never left or ever had to deselerate for hours in addition to the other stuff dozer vibrations, the worst thing is the ocillating hum hum....Also I still can't figure why a commercial power meter would have a IR strobe inside the glass on top, come on after dark and shut off at first light, Anybody know what that is about?