oscillating noise above houseLast night my partner and I were awaken by a very loud oscillating/whirring sound above our house, there was definetly no engine sound, so it could not of been any kind of aircraft or helicopter. When my partner looked at the clock it was 2 minutes past 4 in the early hours of the morning, I had heard it a few minutes before my partner when it sounded a lot louder possibly directly above us but I froze and dearn't get out of bed to find out what it was. When my partnber awoke I got out of bed to take a look outside but by then the noise had diminshed considerable and no signb of it.