Before we started wrapping the hoops with CF and epoxy, they were breaking left and right at all the farms from florida to California. I was one of the guys who got to fly out and do on-sight repairs. I have been to 4 different farms and when they start cranking, you hear them. But you have to be under them, it't not like they are some public nuisance or anything, they just make a deep sounds that is actually pleasing

Quick story:
Once one flew pretty far and flew through a barn and stuck in the ground about 3 feet! THese where 75 foot blades. The owners of the barn thought is was a UFO hahahahah. He was a cool guy and was in good spirits when the crew got there, I was not on that crew so I only got to see pictures, it was pretty damn crazy looking.