BS EN 1793-4:2015 PDF

What is BS EN 1793-4- Sound diffraction of added devices in road traffic noise reducing devices about?

BS EN 1793-4 is a standard that serves technical specifications for sound diffraction of added devices in road traffic noise reducing devices, enabling noise reduction in pedestrian road and traffic applications. BS EN 1793-4 describes a test method for determining the intrinsic characteristics of sound diffraction of added devices installed on the top of traffic noise reducing devices. BS EN 1793-4 test method prescribes measurements of the sound pressure level at several reference points near the top edge of a noise-reducing device with and without the added device installed on its top. BS EN 1793-4 method gives the acoustic benefit over a simple barrier of the same height; however, in practice, the added device can raise the height, and this could provide additional screening depending on the source and receiver positions.