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Old 16th June 2009, 12:45 AM   #1
dhenryp is offline dhenryp  United States
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Default BLH example with Hornresp in pictures

I'm writing this to walk you through a simple Back Loaded Horn example using Hornresp. It uses a Fostex FE126E and is a simple two segment horn. The end result is very similar to my Bugelhorn:

Bigger Frugel horn (Bugelhorn?)

First: Read the wicki. It's good and getting better:

http://www.diyaudio.com/wiki/index.p...=Hornresp+Help

Next: Download Hornresp and started it up. You will start with some uneditable default parameters. Follow the steps in the picture.
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Old 16th June 2009, 12:47 AM   #2
dhenryp is offline dhenryp  United States
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Then follow the steps in this picture.
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Old 16th June 2009, 12:48 AM   #3
dhenryp is offline dhenryp  United States
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Next define the horn expansion as two stacked conical (i.e. straight sided) segments.
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Old 16th June 2009, 12:49 AM   #4
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Old 16th June 2009, 12:50 AM   #5
dhenryp is offline dhenryp  United States
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The enter the Fostex FE126E Theil Small Parameters from the data sheet. One note on CMS: There is a typo in the CMS values given by Fostex for every driver. It is 1000 times too small. The picture shows the correct value.
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Old 16th June 2009, 12:52 AM   #6
dhenryp is offline dhenryp  United States
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Then zero out some entries because this is a BLH. See the Wicki for an explanation.
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Old 16th June 2009, 12:55 AM   #7
dhenryp is offline dhenryp  United States
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Then enter the CC volume and select "Calculate".
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Old 16th June 2009, 12:57 AM   #8
dhenryp is offline dhenryp  United States
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Here is what the SPL response window should look like. This represents the response t he mouth of the horn.

Lastly: Thanks David for writing such a great tool! "David who?" you ask? YOU didn't read the Wicki!
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Old 16th June 2009, 02:36 AM   #9
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To a BLH (actually, loudspeaker!) novice, this seems very helpful. Nice.

Cheers
Raymond
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Old 16th June 2009, 07:01 PM   #10
dhenryp is offline dhenryp  United States
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Default Comparing two simulations

Note: When you "Capture Current Results" you don't just capture one screen but the whole series of "signal screens".
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