Posts Tagged aeolian

ArtDiffusor® Model C vs. Aeolian®: Similar, yet different.

Art Diffusor Model C vs. Aeolian Sound Diffuser

For this installment of “Similar, yet different” we look at The ArtDiffuser® Model C and the Aeolian® Sound Diffuser.

While these two diffusers look very different, there are a fair amount of similarities between them.  Their physical size and depth allow them both to be great mid-frequency diffusers, but did you know that the Aeolian® started life as a blocky-looking diffuser – just like the Model C?  It’s true!

ArtDiffusor® Model C array on a hanging bass trap.

The mathematics behind the two diffusers is similar, but the implementation is different.  While the Model C retains its “blocky” appearance, the Aeolian has run through a mathematical process called “bicubic interpolation.”  Without turning this into a math-heavy post, if you take a “blocky” design like the Model C and run its geometry through bicubic interpolation, you get a “curvy” surface like the Aeolian® – It “smooths” the transition from one block to the next in a 3 dimensional matrix.

While they did not begin as identical geometries, they were similar in their height ratios – with the Aeolian® starting with fewer blocks in a more random distribution, and a slightly taller maximum height.  They both effect similar frequency ranges, with the Aeolian® going slightly lower and higher due to its depth and interpolated surface.  The pattern and type of the diffusion is also different because of the different geometries – the Model C has blocks, and the edges of those blocks introduce a great deal of edge “diffraction” – which is what happens when a wave interacts with an edge, or corner, of a surface. It bends and shears around the edge, which helps break up the continuity of the waveform, where the Aeolian® takes the approach of redirecting most of the energy off a randomized and continually-curved surface.

Aeolian® Diffuser array on the back wall of Big3 Studios.

It is important to note that the two are similar, yet different in their absorption numbers as well.  With the Aeolian® being deeper with a single large cavity, it provides a bit more absorption in the low frequencies than the Model C, which is a more rigid geometry containing smaller elements.  Depending on the space, this may be a useful addition to the diffusive properties.  While some spaces need the extra absorption, some are pretty well balanced already and are just looking to “sweeten” the sound a bit.

On the surface, they are both a nominal 2’x2′ square of thermoformed Class A plastic with lightly textured surface.  That is the extent of the visual similarities, and we cannot hide the aesthetic differences between the two devices. The ArtDiffusor® Model C is a “classic” diffuser.  Many have been looking at these for the better part of 3 decades now.  It’s a classic design at this point with no need for introduction – it is what the quintessential diffuser “looks” like.  In fact, when many people think of a diffuser – the Model C is what they visualize!  The Aeolian® is a modern rendition of the classic design. Using modern calculation techniques, we can now present the type of diffusion the Model C is famous for, in a different way.

While the two geometries look entirely different, and perform a bit differently, they have a common heritage as mathematical, 2-dimensional diffusers.  You could say that the Model C is the grandparent of the Aeolian®, and that pedigree has been passed on – having a similar foundation, but a different final interpretation.

 

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3 Years of the Aeolian® Sound Diffuser

3 Years of the Aeolian®

It may seem a lifetime ago, but we are celebrating the 3rd Anniversary of the release of the patented Aeolian® Sound diffuser.  During development, our team ran numerous models and simulations, revising the design, and optimizing the performance to create the iteration we have today.

The development workflow of the design included computer optimized geometry, performance simulation, rapid prototyping, and full acoustic performance and validation testing.  This was one of the first uses of this completed workflow, and while we are always refining our development processes, this was a huge leap forward.

We now look back at the release of the Aeolian® as a milestone in our history, where we developed something more than a product… we developed a better way to design a product.

Here was the original blog post about the Aeolian®.

Happy birthday.

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Big3 Studios – Aeolian® Diffusers

Aeolian® Diffusers in Big3 Studios

We recently received these wonderful installation pics from our friends at Big3 Studios in Florida. They redid the back wall in one of their control rooms using our Aeolian® Sound Diffusers. In a couple of the pics you can also see our Model C & Model F Art Diffusors® (black) in the ceiling!

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Aeolian™ Diffuser – Mash up

Here’s one of the first install pics of our new Aeolian™ Sound Diffusers, installed in a home project studio. Also note the Art Diffusor® Models F & C, in the ceiling and behind the speakers respectively. This is obviously a diffuser connoisseur’s room.

Below shows the room after the Sonora® products are installed.

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Introducing the Aeolian™ Diffuser

Production Unit – Photo

Acoustics First® is pleased to announce our latest creation: The Aeolian™ Sound Diffuser. In some ways a simplified version of our popular Art Diffusor® Model D, the Aeolian™ is the latest in our line of ‘Organic Quadratics’. Part of the Aeolian’s™ unique design comes from its use of “implied symmetry”. Although the edges are all asymmetric, the height variations are just subtle enough to create an illusion of symmetry when installed in a standard 15/16” grid, or spaced appropriately on a wall. The lack of a uniform edge also has added acoustical benefits in the way of “randomness”.

3D Development Model

Simulations are compared to final test results before production. (Test result by NWAA Labs.)

The development process for the Aeolian™ was similar to that of our ‘Model D’. Various 3D models were created and refined, after which we ran acoustical simulations. Once we settled on what we considered the optimum design for what we were going for, a full scale 3D model was printed for lab testing. With the ‘real world’ test results in hand, confirming our predicted results, we set about making the final mold, and this new diffuser was born.

Pre-Production Prototype printing on the Gigabot

Aeolian Mold.

 

First batch of Aeolians!

 

The Aeolian™ Diffuser is class A thermoplastic, and 4 lbs. per unit.
Nominal size is 23-3/4” x 23-3/4” with a depth of 5.1”.

Download the Aeolian™ Diffuser Data.

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