To be correct, the sim should contain the throat of the CD. Hence the sim should have 0 throat angle, but be extended down to the actual location of the diaphragm. I assume here that there are insignificant slope changes in this extended region.
Thanks! I have the HF146 driver with a throat angle 29deg. Should I modify the mesh and include the CD throat and move the diaphragm? Or are we talking insignificant changes? Or should I go half way and try 14 throat?
Anyone tried (with success) replace mesh in Abec project generated by ATH4 with mesh from 3D CAD (Solidworks, Fusion etc)?
Been trying to implement the “this is gold” equation in solidworks / surfacing. Not my forte!
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I figured out an easy way to transform these mesh files to solids in Fusion 360. Took a while and lot of frustration but ended up being surprisngly simple way. Import mesh, use mesh section sketch, edit that sketch and tell program to put spline in on top of the profile. Edit to thickness and revolve. To non axisymmetrical it takes bit more, combining bodies, etc. but can work with solids rather than mesh.
Question: If i got 1" comp and i'd extend the horn throat along its opening angle, let's say 20 degree, all the way to make it 2" opening and would then calculate horn to end of it by using this software, would it work? I'd imagine it would increase loading but what else would likely happen?
Question: If i got 1" comp and i'd extend the horn throat along its opening angle, let's say 20 degree, all the way to make it 2" opening and would then calculate horn to end of it by using this software, would it work? I'd imagine it would increase loading but what else would likely happen?
(Slightly less) coarse walls may actually improve guidance.
The mounting holes have to be filled though.
That'll be tricky, because there's two surfaces in the ABEC model generated by ATH4:
1) there's the mesh for the waveguide
2) there's the mesh for the aperture into the room
It's one of the reasons I don't do a whole lot with ABEC anymore; it takes so long to make the 3D model, I can often design and print one in real life faster than I can design one for ABEC.
The colorful horn worked pretty well, but I decided to sell the FBT boxes in original shape, they needed just a small crossover fix in one box. I am setting up my own 3D printer to print larger horns for standard drivers. The RCF was not worth further experiments.
In the past I was able to optimize meshes fairly easily by using Geomagic Design X, as well as their plugin for Solidworks.
Also for Rhino sophisticated (discrete) surface optimization plugins are available, such as Evolutetools and VaryLab.
However, one will soon run into the limitations of even the most advanced mobile workstations while working with large meshes.
A desktop workstation with sufficient RAM and processing power is mandatory.
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oh oh is it "directivity"....oops i think i hit my scotch limit for the day and it's still early...still wish i had a better understanding of this complex math and computer stuff that produces shapes with no correlation to how it sounds in the end...
Bateman googles "Geomagic Design X"
"Artec Eva, Geomagic Design X and one year of Artec Studio Professional for $35,990. Artec Space Spider, Geomagic Design X and one year of Artec Studio Professional for $43,350. Artec Eva and Space Spider, Geomagic Design X and one year of Artec Studio Professional for $55,290."
:O
Wiki: An acoustic waveguide is a physical structure for guiding sound waves.
The noun guidance is also common in Quantum physics to describe motion of particles.
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It's widely known that a glossy/flat/super smooth surface of the inner horn walls is to be avoided.
The use of Nextel for some commercial horn speakers is exemplary
The use of Nextel for some commercial horn speakers is exemplary
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isn't the inside surface tension of the wave guide or horn a matter of weather or not you want to generate drag (friction due to turbulence/resistance) on the outside edge of the wavefront as it leaves the mouth? for example a smooth surface will help to keep the exiting wavefront flat while a rough surface will result in adding some drag to the outside edges of the wavefront making for some curvature all be it a very small amount?
Ro808: I'd need to see some data on what you are talking about. To state "It's widely known" is not enough for me. So many things that are "widely known" are also plainly false...
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Possibly, even though I doubt aerodynamic principles apply to acoustic wavefront propagation inside a horn/waveguide.
I refer to this:
