Are windmills too noisy?

Crest Halifax has a thoughtful discussion about the problem of low frequency noise from windmills, and the illness some say it causes.

Of course it is possible that those reporting the symptoms of Wind Turbine Syndrome are more sensitive to sound and vibration than most people, or even than detection instruments. It’s also possible that other factors are at work. Could the illness be, to some extent, psychosomatic in nature?