On Mon, Jun 03, 2013 at 05:51:40AM -0000, Michael Chapman wrote:
> -If you want a horizontal W (say 'W(2)')
> -if you are happy to have this 'omni' as having a cardiod polar pattern
> (in the vertical plane) -which surely one wants to match the vertical
> polar patterns of X and Y (???)
> then:
> -I am fairly sure you can derive this from a Periphonic B-format, that is
> a transformation from
> { W(3), X, Y, Z } ---> { W(2), X, Y }
> is possible (and X and Y are unchanged).
A vertical section of the required polar pattern would be a
fig-8 but with both lobes positive. G(Az, El) = abs (cos (El)).
Not possible in first order (or any finite order). You can
approximate it using even order zonal components.
Ciao,
--
FA
A world of exhaustive, reliable metadata would be an utopia.
It's also a pipe-dream, founded on self-delusion, nerd hubris
and hysterically inflated market opportunities. (Cory Doctorow)
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