Noise Barriers (also known as Noise Walls, Acoustic Barriers, Noise Fences or Sound Barrier Walls) have been made of a number of different materials over the years.
Izithiyo Sound (owaziwa nangokuthi Noise Izindonga, Noise Izithiyo, Noise ezicijile noma Sound Barrier Izindonga) Kuye kwenziwa yenombolo ngezinto ezahlukene eminyakeni.