Plants Performance on Noise Pollution Reduction based on Visual Characteristics Perspectives

Because of the rapid industrialization, urbanization and other communication and transport systems, noise pollution has reached to a disturbing level over the years. Plants have been suggested as an affordable and natural construction to mitigate outdoor noise pollution in comparison to concrete, metal, plastic and other man-made materials. The goal of noise control is to promote relaxation, satisfaction and well-being in urban residents.  Green belt is known as one of the most important and effective method in residential areas to reduce noise pollution caused by road traffic in urban areas. A row of trees may be an effective technique than other barrier in decreasing noise pollution. In recent years, several methods have been used for measuring the effects of landscape elements on noise reduction. This study attempts to review the applied methods herein. The results showed that green elements not only mitigate noise pollution but also play important role in creating attractive scenes for people which may enhance human tolerance for noise pollution. In addition, organization of plants and their aesthetic values may have positive role on noise reduction.