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Advanced Audio Recording

Introduction to Cubic residue diffusers

In modern studio design acoustic diffusers are used to control wall reflections and create a smoothed sound environment to make it easier for the mixing engineer to judge the true sound of a recording.

CRD - Sound Treatment

A common method of defining the wells' depth is to use the residue value of a division from the square of the coordinate and a prime figure. Unlike as with common QR-diffusers a different equation is used here. Depending on the modulo value used for the division structures can be achieved which lead to more a scattering behavior than known from QRD-Designs.

acoustic diffusers using cubic resdual equations 

Cubic residue diffuser using 11 wells per period.


acoustic diffusers using cubic resdual equations with 13 wells

Cubic residue diffuser using 13 wells per period.


Special Issues

 Unlike the QRDs, these CRDs are not symmetrical themselves. Therefore two of them shall be built and placed in beneath using an inverted well sequence for one of them leading to a full symmetric design.



Conclusion and Summary

 Cubic equations can be used to obtain an alternative kind of sound diffusers.


 See the former article about QRD-diffusers


 You may also want to have a look at the article Studio Design  



© 2005 J.S.