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Old 17th August 2011, 04:27 PM   #2151
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Quote:
Originally Posted by John Sheerin View Post
I have some information on my website about how sound waves propagate around horn bends. It might not be exactly what you're looking for, but it's a start.
Thanks. I'm not really looking to design a folded horn but I find the subject interesting anyway. It would be awesome if David incorporated something like that into Hornresp, though as it stands now it is an incredible service to us to provide such a powerful software package for free. We didn't have this kind of stuff back when I last designed a horn in 1991. I'm really grateful for David's contribution.
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Old 17th August 2011, 05:20 PM   #2152
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Quote:
Originally Posted by John Sheerin View Post
I have some information on my website about how sound waves propagate around horn bends. It might not be exactly what you're looking for, but it's a start.
Very interesting article! thank you! Your animations are fascinating. The sound just seems to squish around the corners, sometimes getting confused reflections or just disappearing. It seems to me that folded corners are low pass acoustical filters that add a lot of distortion, but that's just a guess on my part.
http://www.jhsaudio.com/waves.html

Last edited by dirkwright; 17th August 2011 at 05:29 PM.
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Old 17th August 2011, 07:10 PM   #2153
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Thanks. Actually bends would probably remove distortion. If they're an acoustical low pass filters, they would attenuate harmonics which are what distortion is. They can definitely have a negative effect on frequency response and polar response at higher frequencies though.
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Old 18th August 2011, 06:45 AM   #2154
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Question to David: would it be possible to see an option to choose a frequency response curve between "Acoustic power" and "Acoustic pressure" like Akabak? Thank.
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Old 18th August 2011, 07:44 AM   #2155
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Originally Posted by tb46 View Post
You've got mail.
Thanks Oliver, I will let you know what I find.

Kind regards,

David
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Old 18th August 2011, 07:56 AM   #2156
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Quote:
Originally Posted by julienb34 View Post
would it be possible to see an option to choose a frequency response curve between "Acoustic power" and "Acoustic pressure" like Akabak?
Hi julienb34,

Select the Tools > Directivity > Response... menu command to show the pressure response.

Note that the tool only applies to finite single-segment non-negative flare horns.

You will find that the results are probably different to those generated by AkAbak, which uses a relatively simple directivity model compared to Hornresp.

Kind regards,

David
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Old 18th August 2011, 08:00 AM   #2157
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Quote:
Originally Posted by dirkwright View Post
It would be awesome if David incorporated something like that into Hornresp.
Hi dirkwright,

Sorry, it's not going to happen... :-).

Kind regards,

David
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Old 18th August 2011, 11:05 AM   #2158
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Default Bug Fix

Quote:
Originally Posted by David McBean View Post
Thanks Oliver, I will let you know what I find.
Hi Oliver,

The bug you found has now hopefully been fixed.

Could you please confirm that your Hornresp_good.dat file converts correctly when opened using Product Number 2870-110818.

Thanks again for all your help!

Kind regards,

David
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Old 18th August 2011, 11:44 AM   #2159
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the download site still says 110816 but the download works with 110818 thanks david
Ted
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Old 18th August 2011, 02:48 PM   #2160
tb46 is offline tb46  United States
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Default Bug Fix - Post #2158

Hi David,

The new version downloaded and updated fine with the correct number. Everything I have tried sofar has worked just fine.

Thank you again for your remarkable effort.

Regards,
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