WHAT IS A SOUND BARRIER?
A highway sound barrier is an exterior wall built alongside a roadway that interrupts the flow of sound waves from one area to another.
Two types of highway sound barriers are used.
- A reflective wall which is solid, will break up sound waves and reflect the noise back to the source location.
- An absorptive sound wall is treated with materials often applied to the substrate of a wall that is porous and textured that break up and absorb sound waves. Absorptive noise barriers are also reflective in nature.