How to calculate a Skyline Diffuser?

I cant fin a calculator. The one I found at www.mhsoft.nl is wrong, cause they dont use prime numbers.....

I don't understand what you mean by it does ot use prime numbers. Explain please Andre

This is the link to the ( I guess) wrong calculator. http://www.mhsoft.nl/DiffusorCalculator.html I thought the numbers of the columns must be a prime number, like in this example (13 x13).

The style and formulas are from the linked BBC paper. The 12 x12 array is actually made up smaller arrays. If the design was one cycle, then the usual methodology is to XxY=P-1, where P is a prime number. Numerically, Andre

Do you know, if theres a calculator or excel-sheet? I want to put in frequency range and number of columns, and as output the different lengths of the columns.

g-slam wrote:

Do you know, if theres a calculator or excel-sheet? I want to put in frequency range and number of columns, and as output the different lengths of the columns.

No I don't know of any other than the one you linked. All the formulas are in the BBC paper. It wouldn't take much for you make an Excel sheet for it. Don't forget cell size! Andre

Heres my first try. What do you think?

doesn't Rod have a 2D calculator or spreadsheet on his www.rodssoundsolutions.com web site?

the link is broken...