What is diffraction? It’s deflecting sound by making sound waves interact with each other. And that’s exactly what a 4Silence diffractor does: deflect troublesome sound waves from passing cars or trains upwards.
Resonance and deflection
The diffractor deflects sound because the air in the many grooves of the WHISstone, WHISwall, or WHIStop starts to resonate. Intense movement in the deep grooves deflects the traffic noise’s lower registers. The shallow grooves deflect the high notes.
This way all the troublesome sound waves are deflected, creating a quieter area next to the road.
Minimal impact on surroundings and building process
This way you can achieve large noise reductions for the long term, while barely impacting the surrounding area or the (rail)road building process.