Calculation of Sound Absorption in the Design of Noise Protection of Rooms with High Background Noise and Distributed Noise Sources

The analysis of acoustic conditions in specific rooms of active human communication with elevated levels of background noise, including in waiting rooms of vehicles, corridors and other places of common contacts in educational institutions, open-plan offices, etc. was carried out. A method was developed for combining the requirements for permissible noise levels with optimal reverberation time values for such objects. The method includes joint calculations of the required sound-absorbing finish to achieve the normative values of the sound pressure levels of the reverberation-noise background with distributed sources of speech signals over the entire area of the room. The technique also makes it possible to calculate the required sound absorption coefficient of the acoustic finishing of the room in the normal range of medium frequencies, provided that the area of possible placement of the sound-absorbing finishing in the interior of the room is determined. An important advantage of the developed methodology for combining regulatory requirements for noise levels and reverberation time in the premises of “live human communication” is the fact that all sequential calculation operations are carried out here in a fairly simple analytical form, which allows it to be used for a wide range of architects and acoustic engineers who do not have special software.

Kh.A. SHCHIRZHETSKII, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.),
V.N. SOUKHOV, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Scientific-Research Institute of Building Physics of RAACS (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)

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