Assessment of Noise Conditions in the Premises of Enterprises Built into Residential Buildings

In residential buildings often are placed in enterprises for public use. A special feature of such enterprises is the presence of high noise levels in their premises. Noise has a negative impact on employees and visitors of enterprises, leading to noise in adjacent apartments. Most noise-producing sources emit non-constant sound power over time. As a result, non-permanent noise fields are formed in the premises. The calculation of their energy characteristics has a number of features. To assess the noise in such rooms, the article offers a calculation method based on the idea of the diffuse nature of sound reflection from fences. The method uses a statistical energy model that describes the distribution of reflected energy in closed air volumes in time and space. The direct difference method is used to implement the calculation model. The principles of construction of the calculation method are described, and its accuracy is estimated. It was found that the calculated declines in sound pressure levels over time at the calculated points are in good agreement with experimentally determined declines, and the error in calculating the levels does not exceed 3 dB. The accuracy of calculations is sufficient to evaluate the noise regime and design construction and acoustic means of reducing non-constant noise in time. The method allows you to make calculations in rooms with any complex space-planning parameters, and can be used in the design of noise protection measures in premises built into residential buildings of enterprises.

I.L. SHUBIN¹, Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.);
A.I. ANTONOV², Doctor of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
V.I. LEDENEV², Doctor of Sciences (Engineering),
I.V. MATVEEVA², Candidate of Sciences (Engineering),
N.P. MERKUSHEVA², Master of Science (Engineering)

¹ Research Institute of Building Physics of the Russian Academy of Architecture and Construction Sciences (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)
² Tambov State Technical University (106, Sovetskaya st., Tambov, 392000, Russian Federation)

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