Rich Peet wrote:
> Sorry, I just answered the question. Maybe better to confer with the
> Dad of Telinga.
I've not measured it's shape. Too much like work to do it properly. But
by eyeball it's pretty close to a parabola if not one. It is a much
deeper section with a shorter focus to diameter ratio than the bigger
parabolas. And I do consider that's probably part of the Telinga's
advantage.
In any case, as I understand the theory behind the parabolic cutoff it's
not so much the shape as the size. It's supposed to hide between the
wavecrests and be missed entirely. It could be a flat board and the same
theory would say the same thing.
Unfortunately parabolics don't seem to have read the physics books. Or
maybe that's fortunate.
I try to stick with the practical. Point it at something, see how it
does. Let someone else go "but it can't do that". I care less about the
why than that it does.
Walt
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