> A good friend of mine does location recording for film & video
> documentaries. On one occasion he had to stand directly in the
> propwash of a helicopter as it took off & reported he had no wind
> rumble at all.
But he had the rotor and the tail rotor noise plus the engine noise to
cope with at presumably a very low level setting. You wouldn't expect
to hear "wind rumble" with all that going on. Also if close to the
helicopter, he would be in a high pressure, lower windspeed, zone.
(Ground effect) This is what helps to lift the aircraft. A bit further
to the side, it would be lower aircraft sounds and higher wind noise.
You can often avoid "blocking off" or LF overload, by recording at a
low level. What a windsheild does for you is to let you operate at
useful MF gain levels without low frequency overloads.
David
David Brinicombe
North Devon, UK
Cogito cogito ergo cogito sum - Ambrose Bierce
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