Wind? This Really Makes You Pause
There has to be a simple explanation, but so far, no one has come up with one.
Now granted, it's not that unusual to hear noises in the city, but the general direction from which this noise seems to come from is what makes this sound sort of eerie.
According to this report, many folks thought the noise would go away once construction was completed on the One World Trade Center in New York City, but that is apparently not the case.