Online Acoustic Calculators [English version] - Рекомендації по акустиці приміщень - Aкустические материалы и Технологии
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DIY: How to build a wooden Skyline Diffuser – The Point Of Creation
How to Build an Acoustic Diffuser — And Why You Need Diffusion – Flypaper
Sound Splash - HX Audio Lab
DIY Sound Diffusers: Great Method to Make Skyline Diffusers!
Skyline diffuser I made myself from solid cedar. It's probably too small relative to the size of my theater, but I think it helps with acoustics and looks great. Wasn't sure if
Gotham N23 5" Quadratic Diffusor - GIK Acoustics Europe