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#201 |
diyAudio Member
Join Date: Oct 2004
Location: The Netherlands
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Paul, I sometimes measure horns by letting them face up. Works pretty well!
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Dutch & Dutch |
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#202 | |
diyAudio Member
Join Date: Feb 2003
Location: US
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Quote:
I think it could be worked out with a better use of color (achieving both the dominate beamwidth while still providing considerable detail). I'm not sure if Arta allows this function though, so it would likely have to be corrected in something like photoshop. ![]() I do think it's a good job of measuring (under domestic constraints) - with very good lower freq. measurements for the horn. ![]() Anyway.. the PSE-144 looks like a good candidate for this sort of design solution ![]() HAIGNER Horn Loudspeakers | Alphahorn
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#203 |
diyAudio Member
Join Date: Jul 2004
Location: Mountain View, CA
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Scale seems fine to me, it had -6 and -12 dB contour lines.
I also prefer them w/response normalized so as not to muddy the directivity waters.
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----------------------------------------- Noah |
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#204 |
diyAudio Member
Join Date: Mar 2007
Location: Jyväskylä, Finland
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Dear Santa Claus,
I want to see both raw and normalized graphics. If on-axis spl is shown, directivity sonogram can be just the normalized version. I'd like to see both 1/3oct and 1/12 or 1/24 smoothing too because I want to see the forest and trees. Impulse gating must be told too, this is very important specially when measurements are done how most of us are usually doing it, behind closed doors. Sometimes I also want to see unsmoothed response measurements of various angles horizontally and vertically, with various gating - sort of hardcore for the late hours... I will be a good boy! Juha |
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#205 |
diyAudio Member
Join Date: Dec 2007
Location: Melbourne the sunny city!
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To keep this list clean and short, I've opened a new thread for the above horn:
www.diyaudio.com/forums/multi-way/254468-pse-144-horn-discussions.html Please discuss there. Thanks ![]()
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#206 | |
diyAudio Member
Join Date: Dec 2004
Location: Novi, Michigan
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Quote:
And as to the DI being different than an Abbey/Summa, there really isn't any difference (if we consider averages). The PSE-144 is nominally 80 degrees and the Abbey/Summa is 90. The control stability in the Abbey/Summa is much better however. Paul - did you get a license from Danley to produce these? They clearly violate his patent. He probably does not have an AUS patent, but you could not export them to the US without a license.
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Earl Geddes Gedlee Website Last edited by gedlee; 10th April 2014 at 10:20 PM. |
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#207 | |
diyAudio Member
Join Date: Jul 2004
Location: Mountain View, CA
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Quote:
When looking at a sonogram I don't want to see the frequency response is at any location; I prefer polars for that. If normalized you can see directivity characteristics on a soinogram at a glance; otherwise how the heck can you separate the directivity from response variations?
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#208 |
diyAudio Member
Join Date: Dec 2007
Location: Melbourne the sunny city!
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Further discussions on PSE-144 here. Let's try to keep this list clean
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#209 | ||
diyAudio Member
Join Date: Dec 2004
Location: Novi, Michigan
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Quote:
Quote:
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Earl Geddes Gedlee Website Last edited by gedlee; 11th April 2014 at 02:39 AM. |
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#210 |
diyAudio Member
Join Date: Jul 2004
Location: Mountain View, CA
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Perhaps that useful to you as a skilled designer, but as an end user I'm interested in the directivity characteristics on their own.
Ah, maybe I see what you're getting at - if the response varies as a direct result of spatial power distribution aka directivity, then you'd want to see that. My original thought was that I wanted the response normalized to take out the effects of the driver.
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