How to Build 2D QRD23 Diffuser Using Mobile Application (Diffuser Calculator) - YouTube
QRD diffusers: Technical Reference
audiomeasurements.com
Oliver's Audio Passion - 2D QRD N23 diffuser made by Branislav G. from Slovakia, using my Diffuser Calculator app 😎 🛒 Application ---> https://play.google.com/store/apps/details?id=acoustic.oliver.diffusers&hl=en_US | Facebook
A Short Demo of Acoustic Calculator - YouTube
Calculate a Two-Dimensional Primitive Root Diffuser