mainly just at night, when i am trying to sleep, i hear the very deep hum that stays at the same frequency for 2 to 5 seconds and then drops a few beats for a second or two and comes back up. i watched the original star wars and the empire strikes back in the 80s a total of one time each. contact us for this building's price history or to see units in nearby buildings. there is no defense for the government’s action. some people might think they’re the same. 