467b0e3c$1@news.povray.org...
> When you try to record ambient sounds with a soise canselling mic, you can 
> try wraping your hands around it, leaving only the front showing. That 
> way, your hands will muffle the sound coming from the sides and the rear. 
> If it work OK, you can make a foam envelope or a casing with a directional 
> opening.
>
Not really sure it works : a noise cancelling mike is usually a pair of 
adjacent inverted phase cells, it takes close sources ( i.e. closer to the 
'main' cell, so there is a difference) and cancels remote sources because 
the sound tends to be equal on both cells.
I'm not sure either if you can muffle a thunder with your mere hands :-).
A simple solution is to purchase a simple microphone, there are a lot of 
not expensive yet rather good electrets models.
I may have some thunders recorded somewhere. I'll have a look at my backups.

Marc

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