Hello David!
May I point your attention on this thread:
Klangfilm spherical wave horn calculator - from round to elliptical
So far as I understand your program it can model 2D profiles which have rotational symmetry with the wavefront simulator. With my modification the original sperical wave horns (Klangfilm) become elliptical. Do you have any idea how to simulate such an horn?
Your selectable spherical wave horn profile has no rollback included but in fact the original design has a rollback which you can see in my sheet.
Btw, I have read that the first versions of your code were written in FORTRAN IV. A formular translator
But F IV was very painful to read and to program before F77 became available. I remember very well the quantum chemical tapeworm code without any comments and so many goto xxx lines This language was like investment protection as it was very hard to understand someone else code. And Mainframes are the platform I am currently working with. Still the top of the food chain.
Best regards!
Bernd
May I point your attention on this thread:
Klangfilm spherical wave horn calculator - from round to elliptical
So far as I understand your program it can model 2D profiles which have rotational symmetry with the wavefront simulator. With my modification the original sperical wave horns (Klangfilm) become elliptical. Do you have any idea how to simulate such an horn?
Your selectable spherical wave horn profile has no rollback included but in fact the original design has a rollback which you can see in my sheet.
Btw, I have read that the first versions of your code were written in FORTRAN IV. A formular translator
But F IV was very painful to read and to program before F77 became available. I remember very well the quantum chemical tapeworm code without any comments and so many goto xxx lines This language was like investment protection as it was very hard to understand someone else code. And Mainframes are the platform I am currently working with. Still the top of the food chain.Best regards!
Bernd
Btw, I have read that the first versions of your code were written in FORTRAN IV. A formular translator
Was FORTRAN a 2GL or 3GL, I remember it being vaguely mentioned at college but never learned it. I started on state of the art and cutting edge VB6
Hi Bernd,
Thanks for the link.
An elliptical spherical wave horn could presumably be simulated using finite element analysis techniques.
I included the spherical wave horn option in Hornresp after being contacted by Avantgarde Acoustic, who were using the profile in their horn loudspeakers. I didn't worry about mouth roll-back because they didn't to seem to employ it in their designs to any noticeable degree. I do however allow the Hornresp Le Cléac'h horn profile to roll back.
I thought that FORTRAN VI was wonderful - very powerful and fast - great for heavy number crunching!
Kind regards,
David
Thanks for the link.
An elliptical spherical wave horn could presumably be simulated using finite element analysis techniques.
I included the spherical wave horn option in Hornresp after being contacted by Avantgarde Acoustic, who were using the profile in their horn loudspeakers. I didn't worry about mouth roll-back because they didn't to seem to employ it in their designs to any noticeable degree. I do however allow the Hornresp Le Cléac'h horn profile to roll back.
I thought that FORTRAN VI was wonderful - very powerful and fast - great for heavy number crunching!
Kind regards,
David
Attachments
Was FORTRAN a 2GL or 3GL, I remember it being vaguely mentioned at college but never learned it. I started on state of the art and cutting edge VB6
FORTRAN IV is a third-generation programming language.
Hornresp Update 4840-181108
Hi Everyone,
CHANGE 1
Previously, if the Ap2 slider in the BP6 loudspeaker wizard was set to 0.1, port tube 2 would be removed and the enclosure would simplify to a BP4 alignment. Now the slider has to be set to zero for this to occur. This minor operational change does not affect the results. Attachment 1 refers.
CHANGE 2
Port tube 2 has been repositioned in the BP6P schematic, as suggested by Brian in Post #8790. Attachment 2 refers.
CHANGE 3
Power response, impedance and displacement data can now be exported from the BP4, BP6S, BP6P, BP8, DBR and ABC loudspeaker wizards. Attachment 3 refers.
CHANGE 4
BP4, BP6S and BP6P loudspeakers can now have offset drivers. The offset is specified using the Lo1 and Lo2 sliders. The default Manual setting allows the offset in each chamber to be adjusted individually. The Auto setting makes the offset in each chamber the same. Attachment 4 refers.
Kind regards,
David
Hi Everyone,
CHANGE 1
Previously, if the Ap2 slider in the BP6 loudspeaker wizard was set to 0.1, port tube 2 would be removed and the enclosure would simplify to a BP4 alignment. Now the slider has to be set to zero for this to occur. This minor operational change does not affect the results. Attachment 1 refers.
CHANGE 2
Port tube 2 has been repositioned in the BP6P schematic, as suggested by Brian in Post #8790. Attachment 2 refers.
CHANGE 3
Power response, impedance and displacement data can now be exported from the BP4, BP6S, BP6P, BP8, DBR and ABC loudspeaker wizards. Attachment 3 refers.
CHANGE 4
BP4, BP6S and BP6P loudspeakers can now have offset drivers. The offset is specified using the Lo1 and Lo2 sliders. The default Manual setting allows the offset in each chamber to be adjusted individually. The Auto setting makes the offset in each chamber the same. Attachment 4 refers.
Kind regards,
David
Attachments
i had the same "problem"and the same solution,with the latest version of the FT30
Not for me! I'm actually pretty good at folding up horns. But thanks for the point in the right direction anyway.
Good to know Ur self confidence is top...
Been working with horns since 1993.
If I don't know what I'm doing by now it's time to jump off the bus!
Good to know Ur self confidence is top...
Hi 👋 Mark,
good responce!
I’ve only been doing the same since the early eighties and should probably confess to being well ‘crashed and burned’ by now...
Sad to have missed making Your aquatance at Mandy and Philip’s LSS-Loudspeaker Sourcing Show in Nansha, deeper GZ!
I have ‘operated’ (mainly quietly Ie. ‘below the Radar’) for various Clients (local and further) in the same area for the last +7 years.
With best regards
‘a1greatdane’
Second Your stated sentiments Gents!
Just wish little I was better at it...
All the best