Can Material Composition Predict the Acoustic Efficiency of an Acoustic Board?
A specifier holds two acoustic wall panels . One is dense and heavy. The other is light and fibrous. Which one absorbs sound better? The instinct is to pick the heavier one. Mass blocks sound. That logic works for barriers. It doesn't work the same way for absorbers. An acoustic board that's too dense can reflect sound instead of absorbing it. One that's too light lets sound pass through without enough resistance to dissipate the energy. Material composition matters. It just doesn't tell the whole story on its own. The relationship between what a board is made of and how well it performs is more complicated than a single number on a spec sheet. Let's unpack why. The Intuitive Guess that Fails Most people assume density equals performance. Heavier material. Better absorption. It feels logical. The research says otherwise. A study on fibrous panels found that at 20mm thickness, sound absorption increased as density rose from 100 to 180 kg/m³. But further increases d...