Recent Posts
Understanding Sound Transmission Class (STC) Ratings and Testing: What Is It and What Do The Results Mean?
Sound Transmission Class (STC) is a single number that describes the ability of a building material or partition to block airborne sound. STC is a laboratory test result defined by ASTM E413 for sound transmission loss testing performed according to ASTM E90.
Novelty Test Report VI - Gym Crash Pads
We tested a set of conventional gymnasium crash pads, aiming to ascertain their sound absorption coefficients across a range of frequencies, resembling children's voices. Check out our latest novelty test report to gain insights into the actual absorptive capabilities of these pads.
Novelty Test Report V - Beer Bottles
The 4th of July is coming up and we all know what that means... American flags, country music, fireworks, and long neck bottles! If after a few drinks at the BBQ you notice Luke Bryan's voice getting a little sweeter, it may just be the 200 Hz Helmholtz resonance of all those empty bottles!