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Geddes on Waveguides
Geddes on Waveguides
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Old 12th February 2010, 04:56 PM   #3871
jzagaja is offline jzagaja  Poland
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Geddes on Waveguides
As expected Ok I will do sim later

Quote:
Better is to curve the chanels so that they attach normal to the connecting aperature, but that doesn't change the patent so they are not shown.
Like this one?
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Last edited by jzagaja; 12th February 2010 at 05:00 PM.
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Old 12th February 2010, 05:20 PM   #3872
jzagaja is offline jzagaja  Poland
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Previously discussed in Jean-Michel's thread, an LP caused by the air cushion between diaphragm and phase plug. Curves without LP - horn without a plug.
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Old 12th February 2010, 05:28 PM   #3873
tinitus is offline tinitus  Europe
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Yeah, with basic geometri and logic, that would be the way that makes sense
About equal areas, and compression ratios, I suppose
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Old 13th February 2010, 10:54 AM   #3874
jzagaja is offline jzagaja  Poland
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Modeled Earl's phase plug (maybe requires an improvement) has minor influence on directivity - slightly more linear response.
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Old 13th February 2010, 03:05 PM   #3875
John Sheerin is offline John Sheerin  United States
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That looks wrong. The radial openings of the slot should be largest in the middle (like you have them) and smallest at the outside to have equal areas. You seem to have the middle slot being smaller than the outer slot.
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Old 13th February 2010, 10:17 PM   #3876
jzagaja is offline jzagaja  Poland
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It wasn't bad because I exceed -10dB at 60 deg with CD. Below drawing is a precise redraw from Earl's patent and 18" OSWG. It took almost two hours on dual core CPU.
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Old 14th February 2010, 08:54 AM   #3877
mige0 is offline mige0  Austria
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Quote:
Originally Posted by jzagaja View Post
It took almost two hours on dual core CPU.
If you after some specific details - a single high res simu may take you days on dedicated quad core even


Michael
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Old 14th February 2010, 10:19 AM   #3878
SunRa is offline SunRa  Romania
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Quote:
Below drawing is a precise redraw from Earl's patent and 18" OSWG.
Could you please direct to those papers?
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Old 14th February 2010, 11:03 AM   #3879
jzagaja is offline jzagaja  Poland
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Phase plug with optimum aperture shapes - Google Patent Search
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Old 14th February 2010, 07:09 PM   #3880
mige0 is offline mige0  Austria
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First statement on paragraph "prior art" :
Uuups

Statement at 48 :
even for a noob its obvious that this is a requirement - such things can only go for patent in the country of "boundless possibilities"
Oh boy....


Together with the crude drawing zjagaja takes for a blue copy - stopped reading there ...

Michael
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