Analysis of the Acoustically Noise Situation in an Urbanized Area in the Presence of Vehicular and Industrial Noise

Abstract

Abstract Acoustic noise is now becoming one of the important problems of the technosphere. The source of such noise in the streets of large cities is mainly motor transport, as well as industrial enterprises located in the city and construction sites. In the report some results of monitoring of acoustic pollution of the big industrially developed cities (on the example of the city of Murom) are considered. Monitoring is carried out with the help of a combined ecology-meteorological system. The measurement errors due to the standard octave analysis procedure with a control at central weighted frequencies are analyzed. It is shown that the application of the full spectral analysis using the fast Fourier transform allows us to compensate for these errors. The features of the construction of the measuring channel used in the monitoring procedure are considered. Some results of analysis of the spectrum and levels of acoustic noise on the streets of the city at different periods of the day are given. It is shown that in the most heavily loaded areas of the city, combining the activity of traffic flows and the functioning of industrial enterprises, the maximum values of sound pressure level of acoustic noise can reach 100 dB. Both maximum and average values of sound pressure are analyzed from the point of view of their compliance with the current sanitary norms. The conclusion is made that the actual noise levels exceed the maximum permissible levels for open spaces.