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Posted By: JSHarrisReminds me, I must try and get a DVD copy of that film
Posted By: JSHarrisThe major problem is that focussing infrasound is difficult, and needs large devices (of the scale of wind turbines), so isn't really a feasible proposition.
Posted By: tedBut all simple wind shear calculations (1/7 rule etc) just assume smooth laminar flow and ignore the added complexities caused by turbulence.
Posted By: CWattersOne of the things I read recently is that wind shear involves a change in wind direction with height - so that the blade pitch is less than optimal/wrong somewhere around the disc.
Posted By: CWattersI suppose it's too hard to make a turbine that can very the pitch as the blades rotate like a helicopter.
Posted By: tedOf particular interest to me would be any comments on section 2.9 and the amount of data required to derive valid background noise levels?
Posted By: tedWhere might one go to find arguments in favour or against the statistical validity of such limited data gathering?
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