If I ever finish it, it will have a form of separate application notes - you know what you want to do and there should be a short AppNote on that topic, containing some ready-to-use examples. It's not manageable otherwise anymore, as all the options grow. I can hardly keep track myself...
How to run ATH on Linux (and possibly on MacOS)...
# enter newly created ATH directory in the HOME directory
cd
mkdir ATH
cd ATH
# download and extract the last ATH release with demos (to an own directory)
wget https://at-horns.eu/release/Ath-4.7.0.zip
unzip Ath-4.7.0.zip -d 4.7.0
# download and extract the last almost complete ATH release
wget https://at-horns.eu/release/ath-4.8.2.zip
unzip ath-4.8.2.zip
# download and extract gmsh
wget https://gmsh.info/bin/Windows/gmsh-4.6.0-Windows32.zip
unzip gmsh-4.6.0-Windows32.zip
# download and extract the last released win32 version of gnuplot
wget https://master.dl.sourceforge.net/project/gnuplot/gnuplot/5.2.7/gp527-win32-mingw.7z
7z x gp527-win32-mingw.7z
# download and extract the ABEC (to an own directory)
wget http://www.randteam.de/_Software/ABEC3_Pro/ABEC_Pro_v360b07_NoInstaller.zip
unzip ABEC_Pro_v360b07_NoInstaller.zip -d ABEC_Pro_v360b07
# create an output directory for ATH (the "demos" name is stored in ATH demos .cfg files)
mkdir -p output/demos
# configure paths for ATH
cd 4.8.2
# edit ath.cfg file, with any available editor ... for example nano
# and translate paths in your home directory, for example /home/miero/ATH/ to Z:\home\miero\ATH\
nano ath.cfg
# it has to be executed in the directory with ATH files ($HOME/ATH/4.8.2/ in this example)
wine ath.exe
# but first append report generation section at the end of file
nano ../4.7.0/demos/demo8C.cfg
wine ../ABEC_Pro_v360b07/ABEC3_Pro_32r.Exe
# load there project in the output/demos/demo8C/ABEC_FreeStanding directory
# start solving by pressing ... F5
# disable VACS output .... Alt+a o o
# calculate spectrum ... F7
# export spectras as text ... Ctrl+F7
# close VACS
# generate ATH report
wine ath.exe ../4.7.0/demos/demo8C.cfg -r
# check the generated image in the output directory
open ../output/demos/demo8C/ABEC_FreeStanding/Results/demo8C.png
# and display STL file
fstl ../output/demos/demo8C/demo8C.stl
# enter newly created ATH directory in the HOME directory
cd
mkdir ATH
cd ATH
# download and extract the last ATH release with demos (to an own directory)
wget https://at-horns.eu/release/Ath-4.7.0.zip
unzip Ath-4.7.0.zip -d 4.7.0
# download and extract the last almost complete ATH release
wget https://at-horns.eu/release/ath-4.8.2.zip
unzip ath-4.8.2.zip
# download and extract gmsh
wget https://gmsh.info/bin/Windows/gmsh-4.6.0-Windows32.zip
unzip gmsh-4.6.0-Windows32.zip
# download and extract the last released win32 version of gnuplot
wget https://master.dl.sourceforge.net/project/gnuplot/gnuplot/5.2.7/gp527-win32-mingw.7z
7z x gp527-win32-mingw.7z
# download and extract the ABEC (to an own directory)
wget http://www.randteam.de/_Software/ABEC3_Pro/ABEC_Pro_v360b07_NoInstaller.zip
unzip ABEC_Pro_v360b07_NoInstaller.zip -d ABEC_Pro_v360b07
# create an output directory for ATH (the "demos" name is stored in ATH demos .cfg files)
mkdir -p output/demos
# configure paths for ATH
cd 4.8.2
# edit ath.cfg file, with any available editor ... for example nano
# and translate paths in your home directory, for example /home/miero/ATH/ to Z:\home\miero\ATH\
nano ath.cfg
# try to execute ath.exe without parameters
# it has to be executed in the directory with ATH files ($HOME/ATH/4.8.2/ in this example)
wine ath.exe
# try to generate an output for a demo (using a demo from older ATH release)
# but first append report generation section at the end of file
nano ../4.7.0/demos/demo8C.cfg
wine ath.exe ../4.7.0/demos/demo8C.cfg
# execute ABEC
wine ../ABEC_Pro_v360b07/ABEC3_Pro_32r.Exe
# load there project in the output/demos/demo8C/ABEC_FreeStanding directory
# start solving by pressing ... F5
# disable VACS output .... Alt+a o o
# calculate spectrum ... F7
# export spectras as text ... Ctrl+F7
# close VACS
# generate ATH report
wine ath.exe ../4.7.0/demos/demo8C.cfg -r
# and finally...
# check the generated image in the output directory
open ../output/demos/demo8C/ABEC_FreeStanding/Results/demo8C.png
# and display STL file
fstl ../output/demos/demo8C/demo8C.stl
Just out of interest I tried the profiles from #12,067, this time as free standing (5mm wall thickness).
Note that once the strongest mouth diffraction has been reduced, further increase of size doesn't improve it - that's the remaining diffraction at the outer edge that simply won't go away. All just shifts down in frequency due to the larger mouth size -
Note that once the strongest mouth diffraction has been reduced, further increase of size doesn't improve it - that's the remaining diffraction at the outer edge that simply won't go away. All just shifts down in frequency due to the larger mouth size -
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Yes! Please! I'll send you a case of the finest franconian beer!
Have you tried letting chatGPT create documentation for athorns?
I found that use the difference between the red and green path length would predict the location of the wiggles quite nicely for a listening distance far away.
I could make a better image if you like. I also could try to calculate the difference analytically if anyone is interested.
Yes, that then determines the main part of the delay between the direct sound and the secondary source(s) along the edge. The wiggles on a FR are a result of this delay. It works like this everywhere.
The aim of the mouth rollback is to eliminate these secondary sources. Which can be done almost perfectly, as we know.
The aim of the mouth rollback is to eliminate these secondary sources. Which can be done almost perfectly, as we know.