There was a wind turbine near me that was removed by local council order. It was one of those spiral tube looking ones and the person had put it up in their front yard on essentially a flag pole with guy wires.
The thing had a fair amount of slap in the pole which was kinda scary to watch. But the main thing was this thing screamed when its speed got up. Not sure what it was, whether it was the bearings, the motor or maybe the brakes but it started to sound like a jet turbine spinning up when it was going fast (and bloody hell did it spin fast!)
I used to drive past it on the way to and from work and could comfortably hear it over the car's engine and aircon with the windows closed.