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Old 18th June 2021, 08:48 AM   #12181
David McBean is offline David McBean  Australia
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Quote:
Originally Posted by GM View Post
Depends on where you '**** an ear'
Thanks GM, I have been "listening" in the wrong places, it would seem :-).
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Old 18th June 2021, 08:53 AM   #12182
David McBean is offline David McBean  Australia
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Originally Posted by USRFobiwan View Post
Unless there is specific information which compares HornResp sim vs measurement which might be interesting for David and others.
I for one, would certainly be very interested indeed in seeing any such comparisons.
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Old 18th June 2021, 11:12 AM   #12183
Ballfred1 is offline Ballfred1  Germany
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Originally Posted by David McBean View Post
I have been wondering for a while now if anyone is actually using the Hornresp paraflex models - the silence has been deafening :-).
WE are alive and using your new PH-models nearly everyday

I picked up some of those models and added some 2D-construction-plans to understand how we use your new Paraflex-Implementation for Hornresp. (Thanks again! )

My target was to get the most accurate simulations for our Paraflex-designs. That means it is possible that some values are a bit "off" because i did the simulations reverse-engineered, based on our or my own measurements (perfect conditions in free field).
So i did the measurements of the C2E-18 Golden Formular and the PFX 212 Top OLD version (which i also modified with halfmoon-phaseplugs and rear-path restrictions to get it more flat, which was a HUGE success so far and we are still optimizing). Will show the sims and plans in another posting then.
I also optimized the folded Resonator of the C2E GF118 (made it longer and added damping material) to get the wanted flatness in the upper bandwidth and no unwanted ringing - which i already posted (either in this thread or in another one, can't remember).
In the plan i drawed some overlap areas because Hornresp needs solid walls for a "resonator" and we dont have them in reality, but the values are chosen always as a "middled-value" of the relating path-section.

So this is just "a few" simulations of manys.
The PH1 model is the most accurate so far. (for me)
The PH3 model is always a bit off, but still good. (more accurate in models without throat-chamber - TH-like)
Tom Armitage Giles did some inversions of those models, but we lost some fine-tuning of the LF-path and the merge with that technique.


So all in all we did not disappear WE ARE WORKING!!
Speakers are my hobby and in my fulltime-job as a train-driver with work in the early mornings, days, at night, it's sometimes hard to keep up with all the forum-stuff etc. I hope you understand.


If you guys have any further questions or whatever, contact us
Greetz Patrick
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Old 18th June 2021, 11:51 AM   #12184
grindstone is offline grindstone  United States
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Originally Posted by David McBean View Post
Hi grindstone,

Also, just to check - you have set Ap (the port mouth area) to 200 sq cm and Apt (the port throat area) to 1200 sq cm. Did you mean to specify a negative exponential flare port, or should the figures perhaps be the other way around?

David
Somehow I knew you'd catch that...right when I caught it. In my defense, it was my first one

It's just an interesting thing, this sort of prehensile 4-5 segment. Truly it's the star of this little act of the show. I need to spend more time looking at it and I haven't yet modeled it every which way let alone built or measured anything yet.

THANKS AGAIN!!!!!

PS Really like that single-key filling "switch"!

Last edited by grindstone; 18th June 2021 at 12:06 PM.
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Old 18th June 2021, 12:19 PM   #12185
USRFobiwan is offline USRFobiwan
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Oh made a mistake... brb.
Attached Images
File Type: png comparison-hr-modes.png (154.7 KB, 50 views)
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Last edited by USRFobiwan; 18th June 2021 at 12:29 PM.
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Old 18th June 2021, 12:38 PM   #12186
Ballfred1 is offline Ballfred1  Germany
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Okay guys, here is the most advanced PFX 212 simulation in PH1 model versus reallife measurement.
S1 and S2 are veeeery sensitive in this case, so i call them the magic data
But nevertheless, the model is pretty accurate although values are a bit off etc.

The best thing is its reallife-sound! Truely on point and "lush" as a builder described them recently! Give it a try
Attached Images
File Type: png 000_PFX212_2D_Plan_NEW_CSA60.png (69.1 KB, 47 views)
File Type: png 000_PFX212_PH1-Model_VS_Measurement_CSA60_NEW.png (257.4 KB, 41 views)
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Old 18th June 2021, 01:00 PM   #12187
USRFobiwan is offline USRFobiwan
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Sorry could not edit post #12185 anymore...

Here is the TC2E-121 ph1 sim VS real measurement taken by Mark Tomlin.

measurement-vs-sim ph1.png
TC2E-121-3D-001.jpg
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Old 18th June 2021, 01:32 PM   #12188
David McBean is offline David McBean  Australia
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Originally Posted by USRFobiwan View Post
Here is the TC2E-121 ph1 sim VS real measurement taken by Mark Tomlin.
The comparison looks pretty reasonable to me! Thanks Patrick and USRFobiwan, for the great feedback. It seems that the paraflex simulation models are working as intended, and being put to good use after all :-).
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Old 18th June 2021, 01:38 PM   #12189
David McBean is offline David McBean  Australia
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Quote:
Originally Posted by grindstone View Post
PS Really like that single-key filling "switch"!
You can thank diyAudio forum member 'Mallickarjuna' for that - it was his suggestion :-).
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Old 18th June 2021, 02:51 PM   #12190
USRFobiwan is offline USRFobiwan
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And here is the correct PH1 of the Paraflex TC2E-115-mk3 VS SIM outside calibrated measurement. Dotted is HR simulation.

Paraflex-TC2E-115-MK-3-3D.png

tc2e-115-mk3-vs-hr-ph1-mode-sim-calibrated.png

HR-PH1-tc2e-115-mk3.png
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Last edited by USRFobiwan; 18th June 2021 at 02:54 PM.
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