Investigation and Study on the Influence of High-Density Urban Traffic Noise on the Acoustic Environment of Urban Parks

摘要

Urban parks provide residents with space for relaxation, fitness and recreation, while the surrounding traffic noise has a negative impact on their environmental quality. This study conducted a survey of surrounding road conditions in 49 urban parks in the typical high-density city of Shenyang, China. Two parks were selected for traffic condition measurement and noise simulation with Cadna/A; Spatial analysis was also conducted with ArcGIS. The results showed that: ①49 urban parks were all directly adjacent to urban roads and were mostly adjacent to roads on multiple sides. Adjacent roads were mostly high-level roads; ②Based on the traffic survey of 7 roads of 2 parks, traffic flow was significantly positively correlated with the road level; ③ Based on noise simulation, the L_(Aeq) of the traffic sound on the adjacent roads of the two parks ranged from 59.0-70.9dB(A), and had a certain pattern in time and in whether it was a working day; ④Based on spatial analysis on the significance of traffic sound perception, the proportion of the 2 parks' interior area where traffic sound perception was relatively clear were 36.0% and 51.1% respectively. Going further into the interior, the saliency showed attenuation of different gradients. The attenuation gradients were affected by factors such as spatial characters, landscape features and sound composition.