In another article, I showed the 1D-version of CRDs. Here I like to show some designs for 2D, similar to the method described here: C2D-QRDs.

CRD - Examples

Two example configurations are shown below using dedicated offsets for the well number (typically (n/n - 1) in order to optimize the height:

Cubic residue diffuser using 31 wells per radial period   Z = 31 - mod ( exp ( sqrt(x*x + y*y) , 3) , 31)

Cubic residue diffuser using 31 wells per radial period   Z = 37 - mod ( exp ( sqrt(x*x + y*y) , 3) , 37)

 Conclusion and Summary

 Cubic equations can be used to obtain an alternative kind of sound diffusers. Using a radial value for the well number leads to perfect 2D-structure causing full symmetrical refelctions in all directions..

 See the former article about CRD-diffusers

 See the other diffuser designs