### NOISE EVALUATION METHOD IN A FLAT ROOM WITH EVENLY DISTRIBUTED LENSES

Pages 13-21

In civil and industrial buildings there are rooms, the height of which is significantly smaller than in the plan. Such spaces are flat. Distribution of the reflected sound energy depends substantially on the ratio of length to width and to height. These relations have a significant value to downturns. In flat space the reflected sound energy remains constant height along and varies only in terms of the distance from the sound source. This feature can substantially simplify the formulas for determining the density of the reflected energy. In such areas (rooms of various offices, manufacturing plants, etc.), a large number of equipment and work sources uniformly distributed in the area with approximately equal acoustic power are usually located. The equipment leads to further redistribution of the reflected energy. The technological equipment effect on the energy distribution depends on its sound absorption and sound absorption characteristics of the room. In order to assess the effectiveness of acoustic absorption it is necessary to find a method of calculating noise regime in flat areas, which will take into account the features of noise propagation there. The article presents a method for calculating noise for civil and industrial buildings, taking into account the peculiarities of noise fields in these areas and the presence of the scattering and absorbing sound equipment. The method is based on a statistical approach to the calculation of the reflected sound energy. The proposed calculation method and the computer program can solve the problem by evaluating the noise regime at all the design stages of noise control.

DOI: 10.22227/1997-0935.2014.2.13-21

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