It was shown in this thread many times.
With Ath & ABEC it's a simple exercise.
https://www.diyaudio.com/community/...-design-the-easy-way-ath4.338806/post-6248583
With Ath & ABEC it's a simple exercise.
https://www.diyaudio.com/community/...-design-the-easy-way-ath4.338806/post-6248583
That's not what I said. The zero-mode reflection can be managed. It's being done all the time.
- What's still not very clear to me, however, is how it relates to an area expansion rate. Since there probably can be a reflection even without an area change (like in a bended tube or similar), I guess it's not really the same thing.
- What's still not very clear to me, however, is how it relates to an area expansion rate. Since there probably can be a reflection even without an area change (like in a bended tube or similar), I guess it's not really the same thing.
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The trick is in bad photo quality
- That was an easy (one-perimeter) print, 0.6 mm nozzle, 0.25 (0.2?) mm layer height. Standard PLA stuff.
How do you plan to connect the print to the board? Add a lip on the print to help?
Yea, I should have explained it better. There's a seam (so not a vase mode) but it's one perimeter.
- This was the fastest and easiest way to see&touch the actual shape in its scale. It's not the final form of course - that will have a mouting lip, etc.
As it is it could be already used as a mold basis I guess.
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It's the "gyroid" infill (maybe 5%?) in Prusa slicer, PLA. Yeah, it's easy to fill.
Re filling - https://www.diyaudio.com/community/...-design-the-easy-way-ath4.338806/post-7063674
You can use anything that gets not too hot during curing... otherwise about anything will work I guess.
Re filling - https://www.diyaudio.com/community/...-design-the-easy-way-ath4.338806/post-7063674
You can use anything that gets not too hot during curing... otherwise about anything will work I guess.
This is the structure. I'm not willing to share the actual numbers, sorry - too much work, too little reward.
You only may need to download the latest update: http://www.at-horns.eu/release/ath-4.9.0-pre-release-220919.zip
You only may need to download the latest update: http://www.at-horns.eu/release/ath-4.9.0-pre-release-220919.zip
Code:
HornGeometry = 2
Length = 90
Throat.Diameter = 25.4
Throat.Angle = 0
Horn.Adapter = {
L = 40
Width = 40
Height = 40
Segments = 8
ZMap = 0.5,0.3,0.5,0.3
}
Horn.Part:1 = {
L = 1
Segments = 20
H = {
r0 = 25.4
a0 = 20
k = 4.0
s = 1.0
a = 45
n = 5
q = 0.996
}
V = {
r0 = 25.4
a0 = 20
k = 4.0
s = 1.0
a = 45
n = 5
q = 0.996
}
ZMap = 0.5,0.5,0.5,0.9
}
; -------------------------------------------------------
Mesh.AngularSegments = 64
Mesh.ThroatResolution = 4
Mesh.MouthResolution = 10
Mesh.InterfaceResolution = 7
Mesh.RearResolution = 15
Mesh.SubdomainSlices = -3
Mesh.InterfaceOffset = 0
; -------------------------------------------------------
ABEC.SimType = 2
ABEC.f1 = 200 ; [Hz]
ABEC.f2 = 15000 ; [Hz]
ABEC.NumFrequencies = 40
ABEC.MeshFrequency = 1000 ; [Hz]
ABEC.Polars:SPL_H = {
MapAngleRange = 0,180,37
Distance = 2
}
ABEC.Polars:SPL_D = {
MapAngleRange = 0,180,37
Distance = 2
Inclination = 45
}
; -------------------------------------------------------
Report = {
Title = "DS3"
NormAngle = 0
DrvImp_Range = 40
Width = 1000
Height = 1200
}
Output.STL = 1
Output.ABECProject = 1
The simplest and shortest answer is: "The acoustic impedance Z is the property of a particular geometry and medium."