Dear David -
I've earned a solid "F" as do not know how to properly input what's needed for a simple throat ported front loaded horn (TH1 w. hornresp)
A step by step explanation how to do it correctly for 1 segment, then the other # of segments hornresp can handle would be greatly appreciated.
Best wishes from your lowest and most unworthy student
Freddy
I've earned a solid "F" as do not know how to properly input what's needed for a simple throat ported front loaded horn (TH1 w. hornresp)
A step by step explanation how to do it correctly for 1 segment, then the other # of segments hornresp can handle would be greatly appreciated.
Best wishes from your lowest and most unworthy student
Freddy
Attachments
Hi Freddy,
Just because it is convenient to do so, specify segments 1 and 2 as cylinders, each with a cross-sectional area equal to that of the throat of segment 3. Make the axial lengths of segments 1 and 2 very small, so that as far as the simulation is concerned, in effect the segments don't exist (for this reason the actual cross-sectional area values used are not critical). Specify the horn itself using segments 3 and 4.
Attachment 1 shows the standard model for the system. Attachment 2 shows a "modified" system model with segments 1 and 2 (H1 and H2) effectively removed by making their lengths very small. Notice how the outputs from the driver D and rear chamber port tube RP now both feed into the throat end of H3 (segment 3). The red box in Attachment 3 is the rear chamber RC, specified using Vrc and Lrc, and the green portions are the rear chamber port tube, specified using Ap and Lpt.
I hope this helps, but please don't hesitate to seek further clarification if required.
Kind regards,
David
Attachments
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You always have the cool pics. Is that outta Harry Olson’s half a dozen or so texts?
I'm a zero at best - but its cool to be able to sim that one style. At age 71 I need a new "Karlson" more than horns 
here's a stab - might have goofed in a big way (? didn't have a printer or ruler so held graph paper up the the screen to figure stuff) - its huge
dunno if its even ballpark - could not get the spec of the supposed 12 inch speaker
Thanks David for the detailed explanation.
(Is this arrangement something Brian Steele could put out as a worksheet?)
https://i.imgur.com/8L0PvD1.jpg
here's a stab - might have goofed in a big way (? didn't have a printer or ruler so held graph paper up the the screen to figure stuff) - its huge
dunno if its even ballpark - could not get the spec of the supposed 12 inch speaker
Thanks David for the detailed explanation.
(Is this arrangement something Brian Steele could put out as a worksheet?)
https://i.imgur.com/8L0PvD1.jpg
Last edited:
