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Advanced Audio Recording

Introduction to Cubic residue diffusers

In a former article we explained some aspects of common QR-Diffusers known as Schröder-diffusers. Here a 2D-structure is shown.



2D-QRD - 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 both dimensions are covered which leads to more a scattering behavior than known from 1D-QRD-Designs. Depending on the coordinate shift and the modulo value and used for the division structures can be achieved


2D acoustic diffusers using qrd equations 

An optimized 2D-quadratic residue diffuser using 12 wells per period from 13 - fully symmetrical. Here the equation is Z = (X*X + Y*Y)  MOD 13

 

 

2D acoustic diffusers using qrd equations

An optimized 2D-quadratic residue diffuser using 12 wells per period from 13 possible to become fully symmetrical. Unlike above the equation is Z = (X*X * Y*Y)  MOD 13

 

 

 

Conclusion and Summary

 Optimized QRD-equations can be used to obtain a fully symmetrical 2D-diffuser.

 

 See the former article about QRD-diffusers

 

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

 

 

© 2007 J.S.