Hornresp

[David McBean]

Originally Posted by tb46

Hi David,

In the newest version: 3020-130101:

When opening a new data file (e.g.: Test.dat) this seems to work OK, but, hitting the Calculate button brings up the Air Chamber Resonances Yes/No/Cancel box, and, after hitting Yes (or NO), the program goes on to the Schematic Diagram window. Going back to the original Hornresp.dat file returns Hornresp to its original function, i.e.: Calculate gets one to the SPL Response window.

Bug?

And "Happy New Year",

Regards,

Hi Oliver,

When a new data file is created, the default option settings are initially used - these can then be changed using the Tools > Options menu command. Different data files can have different saved settings.

Best wishes for the New Year to you also.

Kind regards,

David

[tb46]

Hi David,

Thanks that's good to know, and fixes my problem. :-)

Regards,

[whgeiger]

I note that you are receiving numerous requests to extend the functionality of your HR program. In this regard, an offer of a commission (financial reward), organized by those making the requests, might be sufficient encouragement for you to implement them.
TAD uses a resonant cavity in their AFAST Horns to suppress response ripple that increases as horn cut-off frequency [Fc] is approached.
Regards,
Bill

[just a guy]

Originally Posted by whgeiger

... an offer of a commission (financial reward), organized by those making the requests, might be sufficient encouragement for you to implement them.

I don't think that's going to work, he won't even accept donations. I'd love to buy the guy a drink at the very least (or at least forward some $$$ so he can buy his own since I'm on the other side of the world) but he won't accept it.

Fortunately for us there's not much Hornresp can't do, and whatever is left over can be continued in Akabak.

[David McBean]

Originally Posted by whgeiger

I note that you are receiving numerous requests to extend the functionality of your HR program. In this regard, an offer of a commission (financial reward), organized by those making the requests, might be sufficient encouragement for you to implement them.
TAD uses a resonant cavity in their AFAST Horns to suppress response ripple that increases as horn cut-off frequency [Fc] is approached.
Regards,
Bill

Hi Bill,

And a very happy New Year to you also!

Unfortunately most of the requests now being received would require major modifications to the Hornresp architecture to enable them to be implemented in a rigorous and consistent fashion. It is not a question of financial inducement, but rather the amount of work involved in making any such changes. As you know, the program has evolved significantly over the years, but with little alteration to the fundamental user interface or input parameters. I guess, like me, Hornresp is beginning to show its age... :-).

Kind regards,

David

[epa]

Originally Posted by David McBean

Hi epa,

The range of 40Hz to 10kHz was recommended by Jean-Michel (Jmmlc) as providing the best balance between the usefulness of the information displayed, and the time necessary to calculate the results. For this reason, I would prefer not to alter the existing frequency range.

Jean-Michel is the author of the spectrogram routine used in Hornresp.

Kind regards,

David

hi david
i can imagine that todays computers are fast enough to do the caculations pretty quick.
otoh,its not a necessity

[tb46]

Hi David,

New Year, new requests? :-)

When simulating OD horns I'm using Ap1/Lpt to control the entry into the horn at the S2 location, and this seems to work. I think I'm simulating an entry into the horn with a throat chamber coupling duct that has a cross-section smaller than S2.

I would like to additionally have the ability to simultaneously provide a vent for the rear chamber, similar to the way you solved this for CH, by using S4/S5/L45 for the rear chamber port/horn.

Would that be possible without major modifications?

Regards,

[David McBean]

Hi Oliver,

When simulating OD horns I'm using Ap1/Lpt to control the entry into the horn at the S2 location, and this seems to work. I think I'm simulating an entry into the horn with a throat chamber coupling duct that has a cross-section smaller than S2.

Your thinking is correct. The arrangement can be confirmed by checking the default schematic diagram (Attachment 1), or the Loudspeaker Wizard chamber schematic (Attachment 2).

I would like to additionally have the ability to simultaneously provide a vent for the rear chamber, similar to the way you solved this for CH, by using S4/S5/L45 for the rear chamber port/horn. Would that be possible without major modifications?

Unfortunately, no. Definitely another one for AkAbak...

Kind regards,

David

[ßart West-VL.]

David,

I noticed some kind of 'sudden jump' when sliding Vrc and the appearance of 'Helmholtz freq' in the lower right corner. (red color)
The graph suddenly changes a lot too.
Sliding further in the Vrc normally doesn't change the graph a lot, except at this certain point.
Attached are the two screen shots with a Vrc difference of only 0.1

Thank you.

[epa]

i stumbeled to this recently.
it also hapens when you slide the port lenght