Horn segmenting questions

[FlipC]

So I know the trick of figuring out the wave length and then folding that upon itself to figure out the fold pattern but what about the degree of angles to which those folds should be?

Or is it with above to where I have
a straight horn that's mouth it X area so when I bend it that is the degree of angle I get?

Also should it always be expanding?

[GM]

Right, always expanding.

For 'sub' duty the WLs are so long it doesn't matter about the angle. This is only a consideration when you're trying to eek out the max acoustic gain and/or HF BW from one.

GM

[FlipC]

Cool
Thanks