Posts Tagged test data

The Elephant in the Lab – AudioXPress

The elephant in the Anechoic chamber

AudioXPress turned to Acoustics First® for their “Focus on Acoustics” Edition (August 2020), to help shed light on what test data is – and what it isn’t.  Many people rely on lab results when trying to find products that meet design criteria… but there are limitations to this data.  The “Elephant in the Lab” is that there is no such thing as absolute, repeatable, accuracy in lab tests… and this article brings to light why that is, and why it will likely always be the case.

It also addresses the impact this has on calculation accuracy, simulations, and what is being done to address this issue.

Read the article now!

Read the article on AudioXPress.com
You can get more information about the AudioXPress August 2020 issue here.

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Comprehensive Diffuser Data Now Available!

Figure 1 – 3D Polar “Balloons” are used to display a full hemispheric acoustic level response, at specific frequencies, in front of the diffusive surface. This is how a 5000Hz signal would reflect off an Art Diffusor® Model D: If we could see acoustic energy, this is what it might look like!

3D Polar “Balloons” are used to display a full hemispheric acoustic level response, at specific frequencies, in front of the diffusive surface. This is how a 5000Hz signal would reflect off an Art Diffusor® Model D: If we could see acoustic energy, this is what it might look like!

Acoustics First® has long been at the forefront of many exciting developments in the world of sound diffusion. In the spring of 2015, we created a method to evaluate sound diffusers using particle computer simulations. Then we utilized 3D printing technology to streamline the development of new diffuser prototypes. Recently, we received a patent for our innovative Art Diffusor® Model D design. Now we’re excited to announce the release of a new comprehensive data booklet for our entire line of sound diffusers!

In essence, this booklet represents an entirely new way to view and compare sound diffusers. “With technological advances accelerating at a staggering rate, we believed it would be advantageous to compile all of the measurable acoustic parameters of these devices, in order to develop an operating profile for each.” Since sound absorption and sound reflection can both be measured with great accuracy, we foresee a use for this data, or similar data, in virtual acoustic room modeling, along with other useful applications.


Contact us for your own print copy of the Acoustics First Diffuser Data booklet (or click here to download the PDF). The electronic data that was used to create the polar diffusion balloons is also available per request (Data compiled for Acoustics First by NWAA Labs in Elma, WA).
Currently, we are working closely with other members of the industry in an effort to develop a universally accepted standard for testing sound diffusion. In the absence of such a standard, Acoustics First is presenting this data in good faith as we believe it represents the best of what is currently available.

We look forward to sharing more advances in the field of sound diffusion!

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