Acoustic properties of green walls Absorption and insulation: In the past few decades, the issue of environmental quality in the urban environment is a recurring theme. Green walls and roofs have demonstrated great efficiency in the attenuation of adverse effects such as heat islands. The thermal characterization of these systems are well studied, however few studies have been carried out on their acoustic potential. The characterization of the acoustic performance of green walls may provide better results for the acoustic simulation of urban environments, For details information please refer below link :