Fractal acoustic diffuser simulation, for all you audio geeks! The simulation shows sound waves hitting an optimized surface that’s designed to scatter sound in many directions.
I designed these diffusers by combining two engineering paradigms: physical modeling and evolutionary optimization (simulated natural selection). If you’re into details, check out the thesis at Arqen.com/acoustics/. There are more designs, and I’ll be posting free blueprints if any of you DIY geeks want to build them..
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An acoustic diffuser (or diffusor) is a device used to treat unwanted echoes and reflections. Unlike absorption, diffusers preserve the liveliness of your room because they don’t absorb much sound energy. Instead, they disperse it, spreading the energy around the room. Check out Arqen.com/acoustics/ for more media.
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I designed these while searching for the answer to the question: what simple-to-make profiled wall shape gives an optimal trade-off between uniform diffusion and compact geometry? And how can this surface be discovered using a simple optimization framework?
The design system (optimization framework) uses an integer genetic algorithm to find candidate designs, and grades them using a finite difference time domain (FDTD) scattering simulation. I then generated fractal diffusers from the optimized shapes, inspired by the “diffractal” by RPG Diffusor Systems.
The simulation shows a FDTD simulation of near field scattering from an array of fractal diffusers. More geeky stuff at Arqen.com/acoustics/.