METHODS OF EXPERIMENTAL RESEARCH OF NOISE POLLUTION FROM ROAD TRANSPORT AND ACOUSTIC PARAMETERS OF NOISE PROTECTION SCREENS
DOI:
https://doi.org/10.31650/2786-6696-2022-1-63-69Keywords:
highway, noise load, experiment, noise protection screens.Abstract
A review of scientific work on the main sources of noise from road transport and its impact on human health. Measures to reduce the level of noise load on the environment are analyzed.
It is established that in projects of construction and reconstruction of highways measures of reduction of noise loading of motor transport on adjoining territories to highways, especially within settlements, should be considered.
The method is given and experimental measurements of noise load from highways to the adjacent territories depending on the distance from the noise source to the residential area are carried out. It was found that the equivalent sound level in the area adjacent to the residential area, at a distance of 2 m is 74.4 dBA, and the maximum sound level ‒ 78.0 dBA. When measuring the noise characteristics at a distance of 1 m in front of the noise shield, the equivalent sound level was 88.6 dBA, and the maximum sound level was 103.9 dBA. At a distance of 2.4 m from the noise shield, the equivalent sound level was 70.7 dBA, and the maximum sound level was 89.8 dBA.
It was found that during the experimental measurements at a distance of 19.5 m from the existing highway and at a distance of 2 m from residential buildings, the measured equivalent noise level exceeded the established normative value by 19.4 dBA, and the measured maximum noise level exceeded the established normative value by 8.0 dBA.
Experimental measurements of acoustic efficiency parameters of noise protection screens were performed. It is established that noise protection screens are effective means of reducing the noise transport load on the environment. At a distance of 2 m from the noise protection screen, the acoustic efficiency of the screen is 11-16 dBA.
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