Hi Mark,
Still here - hope to release an updated version of Hornresp containing two new features in the next week or so...
Kind regards,
David
Hi David, I've found an old post from you, and you wrote this:
For an exponential horn:
m = Ln(S2 / S1) / L12
or
m = 4 * Pi * fc / c
In each case the unit of m is length ^ -1.
I would like know how to calc the m value for an hyperbolic horn. I suppose it will need the T value. Thank in advance.
For an exponential horn:
m = Ln(S2 / S1) / L12
or
m = 4 * Pi * fc / c
In each case the unit of m is length ^ -1.
I would like know how to calc the m value for an hyperbolic horn. I suppose it will need the T value. Thank in advance.
Hi sebDIY,
For a hyperbolic-exponential horn:
m = 2 * Ln((-B + Sqrt(B ^ 2 - 4 * A * C)) / (2 * A)) / L12
Where:
A = 1 + T
B = -Sqrt(4 * S2 / S1)
C = 1 - T
Note that when T = 1, the above expression simplifies to m = Ln(S2 / S1) / L12, the same as for an exponential horn.
Kind regards,
David
Hi sebDIY,
Not a problem
.Just to complete the picture, for a hyperbolic-exponential horn:
Sx = S1 / 4 * ((1 + T) * Exp(m / 2 * x) + (1 - T) * Exp(-m / 2 * x)) ^ 2
When T = 1, the expression simplifies to Sx = S1 * Exp(m * x), the same as for an exponential horn.
Kind regards,
David
Thank you David, your program has taught me more than I ever thought I would understand.
Sincerely,
Jason
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Thanks Jason, your comments are music to my ears
.One of my key objectives with Hornresp was to try to make it an interesting and fun learning tool, so that it could be more than just a simple simulation program.
Kind regards,
David
Hi Do It Yourself,
Won't WinISD simulate an ABC system?
If not, then it is probably another one for AkAbak
.Kind regards,
David
Attachments
Thanks Jason, your comments are music to my ears
One of my key objectives with Hornresp was to try to make it an interesting and fun learning tool, so that it could be more than just a simple simulation program.
Kind regards,
David
You definitely exceeded those expectations David!
David
RDTeam has a new simulation program, Abec3. It is almost Akabak compatible. The free version has some limitations.
One very interesting aspect of Abec3 is that it allows import of meshes. You can design the horn i a CAD program (FreeCAD for example) and create the mesh in a another program (Gmsh for example). Abec will simulate the horn bends.
With the Abec3 download there is a JBL 4530 simulation.
Could you create an Abec3 export function?
I am working on this in FreeCAD:
The mesh made with gmsh:
RDTeam has a new simulation program, Abec3. It is almost Akabak compatible. The free version has some limitations.
One very interesting aspect of Abec3 is that it allows import of meshes. You can design the horn i a CAD program (FreeCAD for example) and create the mesh in a another program (Gmsh for example). Abec will simulate the horn bends
. With the Abec3 download there is a JBL 4530 simulation.
Could you create an Abec3 export function?
I am working on this in FreeCAD:
An externally hosted image should be here but it was not working when we last tested it.
The mesh made with gmsh:
An externally hosted image should be here but it was not working when we last tested it.
Hi Mårten,
Sorry, exporting AkAbak scripts is as far as I am prepared to go. Presumably though, it would not be too difficult for a user to manually convert an exported AkAbak script to an ABEC3 Lumped Element script. The format and contents of the two appear to be quite similar.
Kind regards,
David
.Hopefully next Tuesday, there will be two new tools in Hornresp for users to play with.