Although many types of diffusers have been proposed, they are predominantly surface treatment. This paper places the diffuser in the volume of the room rather than on the surfaces, forming a volume based diffuser. In particular, we examine suitable sequences for their implementation. We also consider suitable metric’s to evaluate their performance. At first single layer volumetric diffusers are examined, and then multi-layer volumetric diffusers are investigated. In particular, the effects of varying the spacing, and number of layers, is more closely examined. The Boundary Element Method (BEM) model is used to gain accurate predictions of the diffuser’s performance. Finally, we demonstrate a diffusion structure that has a similar performance to that of a Primitive Root Diffuser (PRD).
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