Acoustic Horn Design – The Easy Way (Ath4)

is a soft dome tweeter even a good place to start if i'm trying to horn load it?
"horn load it" in the sense of transforming a regular dome tweeter into a compression speaker: no, not ideal. use a dedicated compression driver for this.
if you are trying to control directivity with a waveguide, that is of course possible, but the horns/waveguides discussed in this thread are specificly designed for use with compression drivers providing controlled wave shape at the exit of the driver, as far as i know.
regarding waveguides using dome tweeters have a look at augerpro's waveguide thread.
 
but the horns/waveguides discussed in this thread are specificly designed for use with compression drivers providing controlled wave shape at the exit of the driver, as far as i know.
Not really. Both can be modeled but only as rigid body approximations, be it a flat piston, oscillating sphere or an axially-moving dome with surround. Maybe with compression drivers there's somewhat higher chance to be closer to reality (the predictions for 1" throats are often pretty accurate to ~13 kHz, irrespective of a driver used). With dome tweeters (and especially the soft ones) it's more of a luck I think, but it's definitely possible to model and use any shape of the source.
 
  • Thank You
Reactions: stv
Have Paraline lenses been simulated yet?
I'm sure they have, though don't have any examples to point to in this thread.
Danley's SBH-10 paraline horn says it can control 140W x 10V using 8 paralines in a 60 inch tall horn/array. I think all he does is shift the entry port to achieve the vertical control but I'm not sure.
The narrow vertical high frequency pattern in a Paraline is a result of a (near) equal path length from the entry to all portions of the exit diffraction slot, creating a (partial) plane wave.
Though it is rated at 140H x 10V degrees, it expands to about 30 degrees vertical at 800 Hz and more than 80 degrees at 250 Hz.
DSL SBH10 Polars.png


Each of the four pairs of Paraline throat adapters in the SBH-10 are a different height, the outer pairs longer than the inner. Though the entry and exits of the Paralines are all physically vertically aligned, the path length difference results in the equivalent of a curved array. The entry points of SBH-10 are also slightly offset from center to shift the HF plane wave up or down.
 
  • Like
Reactions: CinnamonRolls
Looks like you have put a gmsh dll in the folder. There is a text file called ath in that folder where you need to specify the path to the the gmsh executable, I would also go with an older version of gmsh as a safer bet, I use 4.6.0, this is what is in my text file. I use the C:\ drive as I don't have a separate drive or partition.

OutputRootDir = "C:\Horns\4.9" MeshCmd = "C:\gmsh-4.6.0-Windows64\gmsh.exe %f -" GnuplotPath = "C:\Program Files\gnuplot\bin\gnuplot"
 
@fluid

I've downloaded the latest (non-beta) version and had previously downloaded version 4.8.0 (though I never did anything with it back then). I'm currently getting the following error in Version 4.8.2, but 4.8.0 works - running the exact same demo1.cfg file.

Any thoughts on what I may be doing wrong?
 

Attachments

  • Error.png
    Error.png
    43.1 KB · Views: 89