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Old 12th July 2013, 07:11 AM   #3611
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Quote:
Originally Posted by Jeff B View Post
I am not sure what you mean by format of choice, but attachment 2 (-ATAN2 (X,Y) is the correct phase. For a 4th order slope the phase should be at 180 degrees at Fc and wrap at that point. Attachment 1 is not correct.
Hi Jeff,

Thanks for the clarification.

By format of choice I had meant that the phase is often shown unwrapped, without the discontinuity at 180 degrees. I had assumed that this was done simply to make the chart look "neater". What had me puzzled though, was that intuitively, the phase shift at 0 Hz should have been 0 deg, not 180 deg - which is consistent with what you are saying.

On re-checking more carefully, I now see that the charts showing unwrapped phase are using the range 0 deg to -360 deg rather than +180 deg to -180 deg, which explains everything :-).

Thanks again for sorting this out for me - I will definitely use -ATAN2 (X,Y) in Hornresp!

I think I am making progress, although it can be painfully slow for me sometimes... :-).

Kind regards,

David
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Old 12th July 2013, 07:33 AM   #3612
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Originally Posted by tb46 View Post
Looking very much forward to that. Thanks,
Hi Oliver,

Not sure how long it will take - I am very busy at the moment.

In my spare time I have been thinking some more about your impulse response request - I can't resist a challenge :-). It's early days yet, but I am hoping that it might be possible to do something within the Filter Wizard itself, and to therefore avoid the operational complications inherent in transferring filtered SPL and phase data back to the main window, and processing it there.

I will keep you posted on any progress...

Kind regards,

David
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Old 12th July 2013, 07:14 PM   #3613
kees52 is offline kees52  Netherlands
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Hi David

I have done the T-TQWT, well, it is a success, close to what predicted, hmm, a church organ do all the octaves, that is a real experience, the sub is there when needed and gone when not.

I do use it together with open baffles, it match very good.

The bumps are not of the box, that is a error because of grid (50Hz) problems.
I am building a mic who has this anymore (batteries)

regards

kees
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File Type: jpg gemeten op mijn luisterplek.jpg (174.4 KB, 225 views)

Last edited by kees52; 12th July 2013 at 07:16 PM.
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Old 13th July 2013, 06:57 AM   #3614
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Originally Posted by kees52 View Post
I have done the T-TQWT, well, it is a success, close to what predicted,
Hi Kees,

Thanks for the feedback on your project. Pleased to hear that measured results are close to simulation predictions :-).

Kind regards,

David
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Old 20th July 2013, 05:55 AM   #3615
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Originally Posted by David McBean View Post
I will keep you posted on any progress...
Hi Oliver,

Just confirming that the next release of Hornresp will be able to calculate the impulse response of the combined filter plus speaker system, as requested.

Kind regards,

David
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File Type: png Impulse.png (44.1 KB, 175 views)
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Old 21st July 2013, 01:13 AM   #3616
tb46 is offline tb46  United States
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Hi David,

Great news. I'm sure there are all kinds of people waiting for that feature.

Thanks, Regards,
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Old 21st July 2013, 06:59 AM   #3617
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Indeed, great news
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Old 21st July 2013, 07:47 AM   #3618
epa is offline epa  Netherlands
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2nd that.
tnx oliver and david
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Old 22nd July 2013, 08:03 PM   #3619
Nissep is offline Nissep  Sweden
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Hi David.

Have you looked into if its possible to export from Hornresp into Abec3?
ABEC3

Abec3 can even import sketchup drawings of the speaker and room. But inputing driver data and placement in the speaker is not that easy.

But your wonderful program is..
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Old 23rd July 2013, 01:33 AM   #3620
soongsc is online now soongsc  Taiwan
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ABEC is a totally different animal. Particularly useful in calculating looking at wave transmission profiles.
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