Phase plug 30
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Charly25700
diyAudio Member

Join Date: Apr 2019
Phase plug 30

Hello everyone I have some questions to ask you

In retranscribing a well-known patent of phase plug I noticed several things

The first point is the coefficient of flare translated by the formula K = 4pifc / c which, for example, results from 0.19 with C "the velocity of sound in air" in inches and 0.05 in C with cm / s

The results of the calculations that follow are not the same for the expentions calculate in inches and cm

Is this normal or there are changes to be made for the calculation of the coef K

Then another remark to call me for the calculation of the flag and the more the formula of K for the pavilion and K = 2pifc / C with fc in rad / s and the plug K = 4pifc / C with fc in hz
Is normal ?

Second point calculates r1 and r2

How to calculate r1 and r2 in the photo

Edit "r1 and r2 are respectively the radii of the throat center lines as shown in FIG. 3. Direct calculation of throat radiology and r2 is possible but would require a reduction of the mathematical parameters, a difficult and unnecessary step. A simpler method is to measure the throat radii directly from the drawing as shown in "

I will continue my questions on the subject
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 13th April 2019, 01:13 PM #2 Charly25700   diyAudio Member   Join Date: Apr 2019 up
 14th April 2019, 05:32 AM #3 ICG   diyAudio Member     Join Date: Jul 2007 Location: I had a Déjà Moo - I've seen that BS before! Usually you want to keep the difference of the distance from the longest to the shortest point of the membrane to the horn throat as small as possible to reduce or avoid the interferences. That means that the patented phase plug is not ideal. That diversion from the optimum is likely a compromise to fit an existing horn and to replace parts of it for mounting other or modified drivers. Maybe this article helps you to get an idea which is practical and which phase plug design is less optimal. __________________ I had a Déjà Moo - I've seen that BS before!
 17th April 2019, 01:15 PM #4 Charly25700   diyAudio Member   Join Date: Apr 2019 ok can you send me examples of the paper with sheet of calculus phase plug of this type because it is what I research to finally calculate my phase plug, I already have the paper for the radial phase plug but it is not what I'm looking for, by mp I already try to contact Centaury but give no news
 18th April 2019, 04:19 AM #5 ICG   diyAudio Member     Join Date: Jul 2007 Location: I had a Déjà Moo - I've seen that BS before! No, I can't give you any advice because I do not know the driver the driver size the frequency range the horn the dispersion requirements the spl requirements the setup (active, passive, dsp, enviroment, amps, room) __________________ I had a Déjà Moo - I've seen that BS before!

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