Hornresp - Page 57

fb · 31st May 2009, 05:34 AM

Is there a guide somewhere to modelling OS waveguides?

Ta

David McBean · 31st May 2009, 07:17 AM

Hi David_Web,

Quote:

Originally posted by David_Web
Thanks! (I thought I bugged you about that).

You did :-).

Quote:

Originally posted by David_Web
Now I know that when you say "no can do" you really mean "shh, don't ruin the surprise".

Not true - at the time, I had no idea how to export a wave sound file. Jean-Michel came to the rescue though :-).

Quote:

Originally posted by David_Web
But would it be possible to have any popup windows not block the movement of the parent window?
And also to keep IR window open and then update it.

As a general principle, I prefer to use modal forms rather than allowing multiple windows to be accessed. The only exception is the Hornresp Help file form.

Quote:

Originally posted by David_Web
Hmm, maybe the ability to break out response windows for easier viewing.

Sorry - that would require too much work :-).

Quote:

Originally posted by David_Web
I have already played around with the IR export function and listened to the simulation for the TH I built (or close enough at least) and it works really well.
The frequency response also models like it should when run through the IR.

Thanks for the feedback. I am sure that Jean-Michel will be pleased to see that his method is working well.

Quote:

Originally posted by David_Web
btw now the IR is always calculated with resonances not masked.

That is intentional.

Kind regards,

David

David McBean · 31st May 2009, 07:28 AM

Quote:

Originally posted by Don Hills
I just tend to notice things like this.

Hi Don,

Me too :-). The interesting thing is, in this particular case there is an inconsistency in AkAbak itself. A duct closed at one end is treated differently to a waveguide closed at one end. Using node 0 with a waveguide generates an error message.

Kind regards,

David

David McBean · 31st May 2009, 07:42 AM

Quote:

Originally posted by fb
Is there a guide somewhere to modelling OS waveguides?

Hi fb,

Not that I am aware of.

Press the 'O' key when the L12 input text box has the focus to select "Obl" for an oblate spheroidal waveguide.

The Horn Segment Wizard can be quite useful when working with OS waveguides.

Kind regards,

David

palesha · 31st May 2009, 08:16 AM

For measuring the horn length, which is the proper/better method in the drawings A & B of the same box.
The Box B is in the next post

palesha · 31st May 2009, 08:21 AM

Here is Box B

David_Web · 31st May 2009, 10:08 AM

"As a general principle, I prefer to use modal forms rather than allowing multiple windows to be accessed"

Sometimes I find that hornresp covers the data I need when entering driver data meaning I have to close the dialog to move hornresp out of the way. It's fine the way it is but I thought it might be easier to work with.

"Sorry - that would require too much work :-)."
I knew it!

"Jean-Michel came to the rescue though :-)."
"I am sure that Jean-Michel will be pleased to see that his method is working well."
Thanks! It works great.
Now I just have to keep modeling to get the best IR I can.
Ill have to measure the IR of the TH I built and see if it looks similar.

When not using damping in a box I get excessive odd ringing of sort, not a problem per see but a little annoying when you want to model a BR and then get a proper IR of it. Will damping and port be separate in the future?

btw I still think damping creates odd phase and GD shifts. Try a way to small box for a driver, the GD will see a smooth hump at resonance as it should, now add some damping and you get sharp corners and a less wide hump. Not affected by stuffing density.

Henkjan · 31st May 2009, 11:36 AM

Quote:

Originally posted by palesha
For measuring the horn length, which is the proper/better method in the drawings A & B of the same box.
The Box B is in the next post

B is what I use (as I read in MJK's papers)

fb · 31st May 2009, 12:24 PM

Quote:

Originally posted by David McBean

Hi fb,

Not that I am aware of.

Press the 'O' key when the L12 input text box has the focus to select "Obl" for an oblate spheroidal waveguide.

The Horn Segment Wizard can be quite useful when working with OS waveguides.

Kind regards,

David

Thanks David

Is there anything particular to enter for driver params? (for compression drivers)

Eva · 31st May 2009, 09:02 PM

Quote:

Originally posted by palesha
For measuring the horn length, which is the proper/better method in the drawings A & B of the same box.
The Box B is in the next post

Did you use any specific sofware to produce these drawings?

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31st May 2009, 05:34 AM	#561
fb diyAudio Member Join Date: Apr 2005 Location: Brisbane, Aus	Is there a guide somewhere to modelling OS waveguides? Ta

31st May 2009, 10:08 AM	#567
David_Web diyAudio Member Join Date: Sep 2008	"As a general principle, I prefer to use modal forms rather than allowing multiple windows to be accessed" Sometimes I find that hornresp covers the data I need when entering driver data meaning I have to close the dialog to move hornresp out of the way. It's fine the way it is but I thought it might be easier to work with. "Sorry - that would require too much work :-)." I knew it! "Jean-Michel came to the rescue though :-)." "I am sure that Jean-Michel will be pleased to see that his method is working well." Thanks! It works great. Now I just have to keep modeling to get the best IR I can. Ill have to measure the IR of the TH I built and see if it looks similar. When not using damping in a box I get excessive odd ringing of sort, not a problem per see but a little annoying when you want to model a BR and then get a proper IR of it. Will damping and port be separate in the future? btw I still think damping creates odd phase and GD shifts. Try a way to small box for a driver, the GD will see a smooth hump at resonance as it should, now add some damping and you get sharp corners and a less wide hump. Not affected by stuffing density.