Originally Posted by rez
thank you very much guys!
would the b2-frac array of five elements, at 2,1m width, perform like the n-36 or better if mounted in the suggested "0 50 60 50 0" order at different depths? if that mounting will lift the performance above the n-36 we don´t mind a little more work since it is still only straight cuts and mills.
today we had the carpenter at our studio to discuss the work and the materials, but since it is my duty to provide the detailed plans for the build and we have some other things to do first, it is no problem to switch to another design! so i probably will propose the build of a n-36 diffusor for the back wall instead.
one more question: how is the performance of the n-36 above 4000hz and is this of any significant relevance in a smallish room like ours? and what if we would put fractals on just some of the wells of the n-36 diffusor? could that be of any benefit to spread the performance to higher frequencies?
I don't know exactly how well the array will perform if mounted like that, because I've not tested it. I'm confident it will perform much better than it does now, but the n=36 stepped diffuser might still perform better.
Here's why I'm confident that profiled modulations (mounting modules at different heights) will boost the performance: Using the A1-LF design, I tested a variety of profiled modulations, including a 7-module low frequency fractal modulation, which I'll post an image of as soon as I upload it to my server.
I've not tested the n=36 stepped diffuser above 4000 Hz. Usually, the highest frequency of interest for predicting room acoustics acoustics is about 5500 Hz. This is just a hypothesis, but I expect the fractal diffuser (with a good profiled modulation applied to it) to outperform the n=36 stepped diffuser at higher frequencies (e.g., 10000 Hz).
Sure, you could put fractal-like cells on the n=36 stepped diffuser. I'm not sure if it would be worth the time and effort, but it would look neat and it would improve the high frequency diffusion (at the very least, it will create more HF scattering due to the increase in geometric complexity).
Hope this answers your questions! Does everything I've said make sense?