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PostPosted: Thu Jul 09, 2009 6:33 pm 
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Joined: Thu Jul 09, 2009 5:25 pm
Posts: 3
Location: Norway
Hi,

I'm a newbee planning to build a couple of wood diffusers to compliment my Rockwool absorbers to control flutter.

I have been looking at a couple commercially built diffusers and they're quite expensive.
But they would be quite easy to build if I only knew the measurements.

My question is really what calculator I could use to build some of these?
There are quite many calculators like this:

http://www.digitalaudiorock.com/cgi-bin/qrd.cgi

But what should I be using for this project?

Hope someone can help :-)

Best regards


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Last edited by kajakk on Thu Jul 09, 2009 11:42 pm, edited 1 time in total.

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PostPosted: Thu Jul 09, 2009 11:10 pm 
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Joined: Thu Jul 09, 2009 5:25 pm
Posts: 3
Location: Norway
RPG also make something simular:
http://www.rpginc.com/products/flutterfree/index.htm

best regards


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PostPosted: Fri Jul 10, 2009 8:15 pm 
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Joined: Thu Jul 09, 2009 5:25 pm
Posts: 3
Location: Norway
I understand the second picture is based on quadratic residue diffuser with prime=7
But the first picture i don't understand could it be loosely based on the same but with prime=11?
The with is 20cm and the depth is 9,5cm the bandwith is supposed to be 1.000-16.000Hz

any one?

Best regards


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