Designing a dome faceted loudspeaker
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- DeepSOIC
- Veteran
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- Joined: Fri Aug 29, 2014 12:45 am
- Location: used to be Saint-Petersburg, Russia
Designing a dome faceted loudspeaker
Hi!
It's been a while I haven't done a nice project. Now, I think I'm on to a nice one modeling-wise.
I want to build a hemispherical speaker, covered with small drivers. I want some nice pattern. I remember that golf ball contest - that's good, but that's waay too many speakers.
So the first thing I did was converting @ulrich1a's Macro Geodesic dome to be parametric, so I can more easily play with it.
https://github.com/FreeCAD/FreeCAD-macros/pull/41
Having that one done, I went on experimenting. The domes are very nice, but they are made of triangles. Triangles are not the best, they are pretty far from being round. So I tried to make something that closer resembles a dodecahedron, by truncating a dome. Here are some shapes I got:
This one is the first one that looks reasonable. It has quite a bit of wasted surface. But at the same time, it should allow for some room for the speakers to not interfere on the inside. And it has a clear parting plane.
This one is the same as above, but with a bit more truncation. This one is very surface-efficient, but many sides are cut off by quite a bit by the parting plane.
With more facets comes better surface efficiency: Now this one would be crazy big, and I don't have a large enough 3d printer to print this. But I take a note, this is an interesting design, may work with very small drivers.
That's all for now =) I hope for more progress soon.
It's been a while I haven't done a nice project. Now, I think I'm on to a nice one modeling-wise.
I want to build a hemispherical speaker, covered with small drivers. I want some nice pattern. I remember that golf ball contest - that's good, but that's waay too many speakers.
So the first thing I did was converting @ulrich1a's Macro Geodesic dome to be parametric, so I can more easily play with it.
https://github.com/FreeCAD/FreeCAD-macros/pull/41
Having that one done, I went on experimenting. The domes are very nice, but they are made of triangles. Triangles are not the best, they are pretty far from being round. So I tried to make something that closer resembles a dodecahedron, by truncating a dome. Here are some shapes I got:
This one is the first one that looks reasonable. It has quite a bit of wasted surface. But at the same time, it should allow for some room for the speakers to not interfere on the inside. And it has a clear parting plane.
This one is the same as above, but with a bit more truncation. This one is very surface-efficient, but many sides are cut off by quite a bit by the parting plane.
With more facets comes better surface efficiency: Now this one would be crazy big, and I don't have a large enough 3d printer to print this. But I take a note, this is an interesting design, may work with very small drivers.
That's all for now =) I hope for more progress soon.
Re: Designing a dome faceted loudspeaker
What that is on my long list. I want to create a monopole speaker.
So i save this page
So i save this page
Re: Designing a dome faceted loudspeaker
A good use case for Lattice2, and all the Extrudes look pretty cool:
It reminds me of another topic, about a month before you joined the forum, DeepSOIC:
https://forum.freecadweb.org/viewtopic.php?f=3&t=7118
It reminds me of another topic, about a month before you joined the forum, DeepSOIC:
https://forum.freecadweb.org/viewtopic.php?f=3&t=7118
Re: Designing a dome faceted loudspeaker
Thanks for sharing your model.
Estudié ingeniería técnica industrial en España y sólo me ha servido para estar en el paro, no me contratan porque no tengo experiencia, y no tengo experiencia porque no me contratan. No debí estudiar esa carrera.
- DeepSOIC
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- Posts: 7896
- Joined: Fri Aug 29, 2014 12:45 am
- Location: used to be Saint-Petersburg, Russia
Re: Designing a dome faceted loudspeaker
Some progress.
Slicing is tricky... Still not happy with the result.
Slicing is tricky... Still not happy with the result.
Re: Designing a dome faceted loudspeaker
Nice work (even if it's in progress )
What is the lattice motif you're using to fill in your dome ?
You designed it by yourself or it's defined in your slicer ?
What is the lattice motif you're using to fill in your dome ?
You designed it by yourself or it's defined in your slicer ?
- DeepSOIC
- Veteran
- Posts: 7896
- Joined: Fri Aug 29, 2014 12:45 am
- Location: used to be Saint-Petersburg, Russia
Re: Designing a dome faceted loudspeaker
It's slic3r's "gyroid" infill (cool AF). I think it's a feature of slic3r prusa edition only, the Alessandro Ranellucci's one I think doesn't have it. Also I think it's there in Cura.
- DeepSOIC
- Veteran
- Posts: 7896
- Joined: Fri Aug 29, 2014 12:45 am
- Location: used to be Saint-Petersburg, Russia
Re: Designing a dome faceted loudspeaker
Drivers not wired up, and the enclosure not sealed yet. Just dropped them in to see how they fit
Last edited by DeepSOIC on Sun Mar 17, 2019 2:58 pm, edited 1 time in total.
- kkremitzki
- Veteran
- Posts: 2518
- Joined: Thu Mar 03, 2016 9:52 pm
- Location: Illinois
Re: Designing a dome faceted loudspeaker
It looks very cool, I'm very curious as to how that will end up sounding!
Re: Designing a dome faceted loudspeaker
Looking good.
P.S. If it sounds good ... That we will just have to wait and see, and hear.
P.S. If it sounds good ... That we will just have to wait and see, and hear.