[Hygienic aspects of noise prevention in the cities].

The study was undertaken to analyze the sources of external noise, factors influencing the noise regime of the residential area and the characteristics of traffic noise propagation near highway and inside the housing estates. Acoustic discomfort zones were described as illustrated by Troparevo micro-district. Comparative acoustic efficacy of some noise-protective installations was presented, i.e., of wall shields, pits, embankments, scaffold bridges and noiseproof buildings with muffle valves.