> I think I may be having a microphone epiphany or at least what smug
> boffins
> might call "an intuitive understanding" but please feel free to correct
> any
> errors in my thinking. In using a six capsule (or 3 capsule) microphone
> setup with 3 figure of eight pairs this gives you localisation information
> based on the pressure gradient between each of these pairs (given by the
> antiphase ?) . This pressure gradient gives you the localisation of the
> sound on any of the given axis (X,Y,Z) and with this information you can
> get the localisation of the sound in a sphere ? Is this correct , or even
> vaguely correct ?
>
I won't comment in details as either
-you've missed something, or
-I have misunderstood.
If you have three ribbon microphones (one on each axis), or
some other 'figure of eight' microphones, you will never
get ambisonics.
Just as two (what is, in fact, Blumlein stereo) will never give
you 2-D / pantophonic ambisonics.
You need the zero-order component ('W') as well.
Two figure of eights and an omni will give you X,Y and from the
omni: W.
But obviously trying to put all that lot in the same spot in space at
the same time has led to simpler approaches ;-)>
You need the sum, as well as the differences ...
Michael
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