Acoustic Horn Design – The Easy Way (Ath4)

[mabat]

I would highly doubt that. I think we are thrown back on the numerical approach here. Which is fine, it works.

One of the nice things about this all-in-one description is the ultimate/intrinsic smoothness of the whole curve. You don't have to care about that anymore.

 

[mabat]

Oops, I forgot to re-normalize the parameters - here it's correct + the core of a gnuplot code.

k1 = r0*r0
k2 = 2*r0*tan(a0)
k3 = (R*R - k1 - k2*L)/(L*L)
x0 = sqrt(r*r + (s*m*L)**2)

y1(l) = R + u - sqrt(u*u + k3*(l-L)**2)
y2(l) = sqrt(k1 + k2*l + k3*l*l)
w(t) = t**q

x(t) = x0 - sqrt(r*r + (s*L*(t-m))**2) - b*(t*L)**2
y(t) = w(t)*y1(t*L) + (1-w(t))*y2(t*L)

set parametric
set trange [0:1]
set samples 100

plot x(t),y(t)

 

[rhythmsandy]

can anyone help me Im not able to open the ATH4.8 it just crashes the moment it open like a small screen comes up and disappear even before I see whats in it
are there any software requirements to run ATH 4.8? please guide me.

 

[mabat]

please guide me.

Did you try the User Guide?

 

[Tom Kamphuys]

Ath doesn't have a gui. The documentation (https://at-horns.eu/release/ath-4.8.0.pdf) was enough for me to get started.

 

[mabat]

A short study of the influence of the various parameters on the waveguide shape -

 

[aragorus]

This is very elegant indeed!

 

[rhythmsandy]

Did you try the User Guide?

tried with the config file as :

OutputRootDir = "C:\Horns"
MeshCmd = "C:\Horns\gmsh-4.9.3\gmsh-4.9.3-Windows64\gmsh.exe %f -"
GnuplotPath = "C:\Horns\gnuplot\bin\gnuplot"

and even after adding those lines in the config the same problem when I click the ath.exe file also tried to create a shortcut and referenced the ath.exe same problem.

what else to be done?

 

[rhythmsandy]

I have got the above response in commandline

 

[mabat]

To run it as expected, type e.g.: ath demos\demo1.cfg
Your both commands shown were wrong (passing a wrong file as the parameter).

 

[aragorus]

View attachment 1017926

I have got the above response in commandline

Start with the help guide and some of the examples. You are missing the Horn Length parameter.

 

[rhythmsandy]

To run it as expected, type e.g.: ath demos\demo1.cfg
Your both commands shown were wrong (passing a wrong file as the parameter).

I`m getting this. In cfg file the path is mentioned as above also have tried complete demo1.cfg file path

 

[rhythmsandy]

Start with the help guide and some of the examples. You are missing the Horn Length parameter.

how do we see list of parameters that has to be entered.

 

[mabat]

Manually create the directory C:\Horns\demos.

 

[rhythmsandy]

I got the following after manually copying the directory to the above said location. Now im able to open the geo file but Abec is throwing some errors.

 

[mabat]

ABEC2-Beta?? Please use the latest available ABEC3:
http://www.randteam.de/_Software/ABEC3_Pro/Download-ABEC-Pro.html(You can still use the professional version the same way as a demo - it just won't save data without a licence key).

 

[rhythmsandy]

Im able to get this now How to see the polar plot and the frequency responses can you please help me.

 

[mabat]

Please don't turn this thread into a personal help desk and try on your own for a while now.
The User Guide should really help you for the start: http://www.at-horns.eu/release/ath-4.8.0.pdf#page=32

 

[mabat]

R-OSSE - I've added the expansion factor of the OS-SE formula (it's 'g' here) - https://www.desmos.com/calculator/sy9pwilogj

 

[miero]

Desmos plots:
x(t) - https://www.desmos.com/calculator/uxifyrlqkx
y(t) - https://www.desmos.com/calculator/pa21fyklga

Integrated version with a single parametric plot of the whole profile:
(x(t),y(t)) - https://www.desmos.com/calculator/prmltiav0g

EDIT: updated version