Quote:
Originally Posted by Xenon  These two equations are the same |
Sorry - that's a cut and paste and then forget to edit typo
Should be:
Standard N11 panel ........well depth = (well number squared) mod 11
Optional N11 panel ........well depth = (well number squared + 2) mod 11
Quote:
Originally Posted by Xenon how did you arrive at:
2 3 6 0 7 5 5 7 0 6 3
(maximum depth 7/11) |
Using well depth = (well number squared + 2) mod 11
Well 0.....depth=(0^2 + 2) mod 11 = 2 mod 11 = 2
Well 1.....depth=(1^2 + 2) mod 11 = 3 mod 11 = 3
Well 2.....depth=(2^2 + 2) mod 11 = 6 mod 11 = 6
Well 3.....depth=(3^2 + 2) mod 11 = 11 mod 11 = 0
Well 4.....depth=(4^2 + 2) mod 11 = 18 mod 11 = 7
Well 5.....depth=(5^2 + 2) mod 11 = 27 mod 11 = 5
Well 6.....depth=(6^2 + 2) mod 11 = 38 mod 11 = 5
Well 7.....depth=(7^2 + 2) mod 11 = 51 mod 11 = 7
Well 8.....depth=(8^2 + 2) mod 11 = 66 mod 11 = 0
Well 9.....depth=(9^2 + 2) mod 11 = 83 mod 11 = 6
Well 10...depth=(10^2 + 2) mod 11 = 102 mod 11 = 3
Quote:
Originally Posted by Xenon I think you're suggesting that both N7 + N11 have the same LF cutoff. And to build the N7 shallower (max. well depth = 121mm) to match the LF of the N11 (max well depth = 135mm), yes? |
That's correct. Pack the N7's out from the wall with 14mm spacers and they will be flush with the N11's
From your constraints of Fins=2.5mm, Well width=30mm, maximum depth 135mm, you get:
N7 panel width = 228mm
N11 panel width = 358mm
both of which are less than the 424mm panel width needed to diffuse 811 hz.
The N7 panel would need wells 59mm wide to fix this. Since the N11 has more wells, they would only need to be 53mm, but then the HF cutoff would be different. Better to make them the same. Why not glue two pieces of your foam together for 60mm wide wells?
There are plenty of ways to mix up the panels. Some would argue that you can have a different frequency for the 2nd panel. Jason would know more than me on this.....