"These geometries represent a build structure, it is proyected on a surface, the idea is that those are the surfaces that are reached with the rays of sound emmited from the source, which is the centroid of the sphere that owns the sub-surface."
"Simple Helmtholtz resonator, in architectural acoustics it is used to absorb a particular frequency depending on S= the area of the bottle's aperture, L=the lenght of the neck, and V=the main volume of the bottle. I said bottle because is like…"
"Multiple helmholtz resonators, they act like a bunch of simple resonators joined together, the graph shows in Y the maximum absorption percentage, and the Y shows the bandwidth of the frequencies absorbed."