We don't need to "think" if they are noisy. We can measure that. So how noisy are they?

They're silent.

I don't know where Trump got the idea from. Perhaps he thinks they work like fans?

	▲	wizzwizz4 14 minutes ago \| parent [-]
		They're most certainly not silent! If you're standing right under one, you can hear it over car traffic and the breeze! (Well, unless the wind is blowing really hard: then the wind might be louder than either, considering the usual minimum distance between wind turbines and roads.) Whatever will you claim is silent next? Refrigerators? Lightbulbs?