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Old 2nd October 2009, 03:19 AM   #1
grecon is offline grecon  United States
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Default convert horn response data to cutting wood!

How do you convert Horn Reponse data to cutting wood!

I've been lurking for quite awhile trying to learn from your threads.
I've learned the basics of entering a driver into Horn Response and using the tapped horn wizard to design a TH.
I've studied several different tapped horn foldings.
I learned of Volvotreter's folding idea to bring the box down to shorter lengths. I don't do autocad but I can print out a Horn Response Schematic diagram, cut it into pieces and arrange them as per similiar foldings I've seen.
I still do not understand how to use this information to get actual measurements to cut wood. Its just not clicking.

Where is the "Dummies" book for me!
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Old 2nd October 2009, 10:20 AM   #2
MaVo is offline MaVo  Germany
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Use google sketchup. Translate the hornresp horn segment length and area data into one long conical shape in it. Cut the conical shape up and arrange it into a box shape. Take the virtual measuring thing and get the size of the surfaces you created.
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Old 2nd October 2009, 06:49 PM   #3
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Use the export function in schematic tab, choose the height and increment. Width flare should be Uni.
I export to txt file and then copy/paste it into excel as it won't open csv files properly.

Then print it out and start crunching numbers.
You will notice that the walls are not straight, this is due to conical expansion vs linear for the physical horn. The difference is usually minor but can be corrected somewhat with folding. Won't impact the response much though. Unless you have extreme flare.

You can't use the printout from HR directly as it has cone diameter as height unit.

It's not easy to fold but you get there.
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Old 4th October 2009, 12:58 AM   #4
Mark Kravchenko --- www.kravchenko-audio.com
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Location: Perth Canada
Default Here is basically what I do

Start with the input screen
Second calculate the box
Third go to the schematic screen
Fourth top left hand side click and click on file then export
Fifth specify a box width this one is 8 inches or 20.32 cm
Sixth specify a measurement increment. I usually use 10cm or about 4 inches.
Seventh on the right hand side click on the boxes and set them to uni this will make the horn box change dimensions in one plane only. It will leave your set box width untouched but vary the height.
Eighth find the saved file in the hornresp folder and open it up in note pad.
Ninth study what you have here.'
Tenth plot it out full scale onto what ever you have and work towards a fold. How? All along the horn path length you have calculated the height at 4 inch intervals. So mark them. I personally mark the start and stop of each section as I usually design with conical horn segments. This means you have only a few dots to make out. Now connect the dots using a straight edge and you get the horn contour. If you want to fold the horn you have something full scale you can at least visualize.

MarkBasic steps to get from Hornresp Data to box 1.GIF

Data to box part 2.GIF

Data Part 3.GIF
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Last edited by mwmkravchenko; 4th October 2009 at 01:00 AM.
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