Wind speed figures are averages over a certain time; whereas, what ruins a recording is the momentary peak that causes a "blast" - and wind can be a fairly steady blow from one direction, or turbulent gusts from everywhere. The criteria for "noise" also vary with use. For music one "putter" of wind could be very annoying, but for a gritty news report in a storm, one only cares if it is intelligible. So, correlating effectiveness with wind speed is all but impossible - but with the right mic, the right user, and the right Rycote successful recordings have been made in full gales.
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