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Old Yesterday, 05:35 PM   #4891
gedlee is offline gedlee  United States
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Originally Posted by jzagaja View Post
Porous walls or internal volume or both? Why not print porous waveguide - will be slow but doable.
Give it a try.
Earl Geddes Gedlee Website
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Old Yesterday, 10:42 PM   #4892
tmuikku is offline tmuikku  Finland
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Back to the guestion between flat DI or slightly rising one. A paper was posted on another thread

And a quote from page 17:
"... if the axial response is substantially flat,
the inverse of the directivity index gives a useful approximation of
how the speaker will measure in a room – of any size."

If this is true then people who would like a bit downward sloping response on a speaker would prefer the slightly risin DI waveguide since it would have downward sloping power response? But, when the DI is flat, the power is also flat if the on axis response is flat? This one would be outside of the circle of confusion, the flat?

Last edited by tmuikku; Yesterday at 10:45 PM.
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Old Today, 07:01 AM   #4893
mabat is offline mabat  Czech Republic
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If the axial response is substantially flat, the inverse of the directivity index is simply the power response. This is not the same as the in-room response but close.

Sure, this is still the same debate we had earlier. I'm only not sure I follow what you say of being "outside the circle of confusion".

Last edited by mabat; Today at 07:08 AM.
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