Since the normal windmills have sound when you're near them and they're working (unless I'm going crazy), can the giant kinetic windmills have sounds too, since it seems strange how big rotors make no noise yet no rotors at all make you think you're just hearing things 
+1 the idea if my idea of the kinetic wind generator rotor (iridium) got implemented, lol 
PS : I still +1 this anyway.
Also since the kinetic windmills are way bigger in size than the regulars, it should make its sound from a very large distance (256 blocks), and also be quite loud if close.
