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Re: Wind/LF energy through tripod/stand

Subject: Re: Wind/LF energy through tripod/stand
From: "Avocet" madl74
Date: Sun Aug 19, 2012 8:24 pm ((PDT))
> Would lowering the tripod as low as it goes help in this situation?

Peter,

Yes and I'm always advocating getting mics low in field recording as
they often sound better low down or actually on the ground. And the
windspeed is generally lower down there.

I've had wind vibration (aeolian vibration) on a hand boom and traced
this down to transmission from the blimp itself. Tap a blimp and you 
can hear this. Gunmics, especially long gunmics, are prone to picking 
up blimp vibration, and no amount of soft suspensions inside can stop 
this. The blimp deflects the wind smoothly, but if it itself vibrates, 
the mic picks this up. The MKH-816 in a blimp windgag is very prone to 
this. A loop of mic cable can also vibrate in the wind.

The other source of wind rumble is wind turbulance from other objects
upwind. One gross example is from wind turbines where the wake is
silent until it meets a fixed object when it roars. This is called
modulation noise or secondary noise and can cause rumble or hiss on a
mic from objects like a fence.

David

David Brinicombe
North Devon, UK
Cogito cogito ergo cogito sum - Ambrose Bierce







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