Hornresp - Page 5

David McBean · 12th April 2008, 08:39 AM

Quote:

Originally posted by Sabbelbacke
Hy David.

Thanx for the helpfull reminder and the quick fixup

Hi Sabbelbacke,

No problem :-). If you find any more bugs, please let me know.

Kind regards,

David

Paul W · 12th April 2008, 02:14 PM

Hi David,
First, thanks for a great tool!

Question...
With a conical or OS, I am seeing directivity dramatically narrow just above LF cutoff. Is this because there is no baffle or mouth treatment? If not, what does cause it?
Thanks,
Paul

MaVo · 12th April 2008, 02:56 PM

That seems to be characteristical for conical horns. I remember Tom Danley posting about this, but not where, maybe the audio asylum. In the unity and synergy horns this is countered with a short horn segment at the end of the horn which has a slightly wider angle than most of the horn. But it seems that hornresp cant simulate the radiation pattern for multi segment horns, so i cannot check if this is true.

David McBean · 14th April 2008, 07:29 AM

Quote:

Originally posted by Paul W
Hi David,
First, thanks for a great tool!

Question...
With a conical or OS, I am seeing directivity dramatically narrow just above LF cutoff. Is this because there is no baffle or mouth treatment? If not, what does cause it?
Thanks,
Paul

Hi Paul,

It gets a bit complicated, but essentially the effect is due to the shape and size of the wavefronts in a conical horn relative to wavelength. Note that the directivity narrowing actually occurs in practice - it is not just in the simulation results that you will see it.

Kind regards,

David

David McBean · 15th April 2008, 06:41 AM

Hi Everyone,

Hornresp Version 19.00 has just been released. Changes are:

1. Offset driver horns can be modelled. See Note 7 on page 15 of the Help file for details.

2. The tapped horn option is selected differently. See Note 8 on page 15 of the Help file for details.

3. The Multiple Drivers tool is now the Driver Arrangement tool. The number and position of drivers can be specified.

4. The profile information for the left and right side walls of a rectangular cross-section horn is now also exported, where the data can be directly calculated. See Note 14 on page 17 of the Help file for details.

5. A bug in the Tapped Horn Wizard which “froze” the program under some circumstances, has been fixed.

Kind regards,

David

Brett · 15th April 2008, 07:40 AM

Thank you David. Us hornies owe you a large debt of gratitude.

MaVo · 15th April 2008, 08:52 AM

Yay for the offset driver option! Building my unity/synergy horn would have been alot easier this way. But now i can use it in my first revision

Thanks!

Sabbelbacke · 15th April 2008, 10:23 AM

Once again: THANK YOU!!!!

Paul W · 15th April 2008, 12:59 PM

Quote:

It gets a bit complicated, but essentially the effect is due to the shape and size of the wavefronts in a conical horn relative to wavelength.

David,
Would you say a bit more about this? I'd like to understand the root cause a little better.
Thanks,
Paul

MikeHunt79 · 15th April 2008, 10:41 PM

I only started using this program last week, and it's excellent.

I just want to say thanks and keep up the good work.

15th April 2008, 06:41 AM	#45
David McBean diyAudio Member Join Date: Jun 2007	Hornresp Version 19.00 Hi Everyone, Hornresp Version 19.00 has just been released. Changes are: 1. Offset driver horns can be modelled. See Note 7 on page 15 of the Help file for details. 2. The tapped horn option is selected differently. See Note 8 on page 15 of the Help file for details. 3. The Multiple Drivers tool is now the Driver Arrangement tool. The number and position of drivers can be specified. 4. The profile information for the left and right side walls of a rectangular cross-section horn is now also exported, where the data can be directly calculated. See Note 14 on page 17 of the Help file for details. 5. A bug in the Tapped Horn Wizard which “froze” the program under some circumstances, has been fixed. Kind regards, David

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12th April 2008, 02:14 PM	#42
Paul W diyAudio Member Join Date: Oct 2003 Location: North Georgia	Hi David, First, thanks for a great tool! Question... With a conical or OS, I am seeing directivity dramatically narrow just above LF cutoff. Is this because there is no baffle or mouth treatment? If not, what does cause it? Thanks, Paul

12th April 2008, 02:56 PM	#43
MaVo diyAudio Member Join Date: Jan 2006 Location: Herne	That seems to be characteristical for conical horns. I remember Tom Danley posting about this, but not where, maybe the audio asylum. In the unity and synergy horns this is countered with a short horn segment at the end of the horn which has a slightly wider angle than most of the horn. But it seems that hornresp cant simulate the radiation pattern for multi segment horns, so i cannot check if this is true.

15th April 2008, 07:40 AM	#46
Brett diyAudio Member Join Date: Jan 2002	Thank you David. Us hornies owe you a large debt of gratitude.

15th April 2008, 08:52 AM	#47
MaVo diyAudio Member Join Date: Jan 2006 Location: Herne	Yay for the offset driver option! Building my unity/synergy horn would have been alot easier this way. But now i can use it in my first revision Thanks!

15th April 2008, 10:23 AM	#48
Sabbelbacke diyAudio Member Join Date: Nov 2006	Once again: THANK YOU!!!!

15th April 2008, 10:41 PM	#50
MikeHunt79 diyAudio Member Join Date: Aug 2003 Location: Bristol, UK	I only started using this program last week, and it's excellent. I just want to say thanks and keep up the good work.

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