Sound wave propagation taking into account architectural-planning and relief features terrain in the area of I station

   The paper studies acoustic pollution of residential areas from the sorting slide of the railway station I in order to reduce the negative impact of noise on the population. As part of the search for acceptable solutions to this problem, the features of sound generation in the source and the specifics of noise propagation in the territory are considered.
   The process of disbanding rolling stock, and especially the sound generation at the moment of passing the wheel rim through the braking position, is the main cause of significant acoustic pollution of the adjacent residential area. The speed and distance of sound transmission depends on many factors – the period of the year, the time of day, the temperature and humidity of the air, the presence of a reservoir nearby, the presence of barriers reflecting the acoustic wave, the architectural and planning organization of the territory, and the terrain.
   Previously, we considered the features of sound wave propagation in various atmospheric conditions. In this article, we will consider how the terrain and the architectural plan of the territory affect the intensity of acoustic pollution of the residential area.
   The height of location of the noise source and protection facilities (residential buildings) largely determine the configuration and design of protective screens – artificial barriers to the propagation of a sound wave. The main task is to construct isolines that visually display the zones of compliance (non-compliance) with the maximum permissible noise levels directly on the terrain map. To do this, the ERA-noise software module was used, which allows you to build map diagrams based on the measurements. They are the basis for designing protective screens on the ground: the correct location of the screen, the size, height and configuration of the screen, construction materials. Additional attenuation of the sound wave can be provided by increasing the security of the object itself – noise-absorbing cladding of the front side of buildings, noise-proof blinds and other means of protection.
   The results of the work can be used to create comprehensive noise protection system projects, which may include protection at the source of occurrence and along the path of propagation, as well as improving the security of residential areas (residential and public buildings). The choice of the necessary protection combination may directly depend on the terrain and architectural and planning organization of the area.

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