ON THE POSSIBILITY OF CALCULATION OF NOISE IN DECIBELS "A" IN PLACES OF MASS STAY OF PEOPLE

Abstract

In the sanitary-hygienic assessment of the noise regime in places where people stay in masses, the sound levels determined in decibels A are used. The paper proposes a simplified technique for calculating sound levels in decibels A, generated by speech in places of mass congestion. The technique allows to significantly increase the speed of calculation of sound levels. The article specifies the limits of its application. Calculation of the sound levels of the speech of a congestion of people can be made directly in decibels A. This makes it possible to increase the speed of calculations by almost 8 times. The errors in the calculation of sound levels in decibels A, according to the proposed method, depend on the characteristics of the sound-absorbing properties of the enclosures. Errors are minimal in the case of low dependence of the noise absorption coefficients of fences on frequency, which is typical for most surfaces of enclosure fencing. The exception is made by sound-absorbing structures, the spectral characteristic of sound absorption of which varies greatly depending on the frequency of sound. When using such structures, it is necessary to perform calculations for all regulatory frequency bands.