Studies have also examined the effect of urban vegetation on
reducing noise levels in the urban environment (Fang and Ling,
2003, 2005; Papafotiou et al., 2004; Lam et al., 2005; Bucur,
2006; Maleki and Hosseini, 2011; Pathak et al., 2011). These
studies demonstrated that noise level attenuation can range between
6 and 27 dB(A). The attenuation depends on the noise level
at source, distances from source and on vegetation features. Bucur
(2006) concluded that planting a combination of trees and shrubs
at a high density can cause an efficient reduction of noise levels
within the urban tissue. Nevertheless, the existing literature has
paid inadequate attention to the seasonal and environmental
impact of urban vegetation on noise levels.