An optimal dimensioning method of a green wall structure for noise pollution reduction

This paper concern the optimization of a multilayered green wall structure including substrate and foliage in order to reduce as much as possible backward noise reflection and forward transmission from the wall. Each component involved in the wall structure is fully characterized experimentally to get its transfer matrix. Simulation demonstrated that foliage layer superimposed to substrate layer doesn't affect the transmission losses but contributes greatly to the increase of return losses of the green wall structure. To achieve the best performances in terms of return and forward losses as well as frequency bandwidth, the methods of optimization are discussed including selection of types of materials, thicknesses, arrangement of layers as parameters.

Automated summary

This paper focuses on optimizing a multilayered green wall structure to reduce noise reflection and transmission. Experimental characterization of each component and simulation show that foliage layer contributes significantly to return losses. Optimization methods discussed include material selection, thicknesses, and layer arrangement to achieve best performance in terms of losses and frequency bandwidth.