I went out on a windy day to see if I could capture the sound the Skystream makes with my video camera. This is a short video of a Skystream 2.4 kw wind turbine on a 70 foot tower on a windy day. I mainly posted it to show how it sounds. You can compare it to a row of pine trees on the same property the same day. You might have to turn the sound up loud to hear it.
Since standard video cameras do not capture enough frames per second (you would need a special camera to capture the turbine spinning at 320 RPMs) the motion of the blades is not as you’d see with the blur of the naked eye.
For comparison, here’s the row of pine trees the same day.