echobeads
Echobeads are a type of specialty acoustic material designed to absorb sound. They are typically composed of small, lightweight, spherical or irregularly shaped particles that are suspended within a binding agent, such as a polymer or a resin. The porous nature of these materials, combined with the intricate internal structure formed by the individual beads, allows for significant sound energy dissipation. When sound waves encounter echobeads, they are scattered and absorbed through friction and viscous losses as the air particles move through the complex network of the beads.
The effectiveness of echobeads in sound absorption is often measured by their Noise Reduction Coefficient (NRC),