COMPARATIVE EXPERIMENTAL EVALUATION OF TRADITIONAL AND IMPROVED NOISE MEASUREMENT METHODS IN A SMALL INDUSTRIAL ZONE

The paper presents a comparative experimental evaluation of the traditional 
(continuous stationary) and the improved (time-distributed) methods of noise level 
measurement in a small industrial zone. The study was carried out in the Yakkasaray small 
industrial zone of Tashkent on a regular 50-metre measurement grid, with both methods 
applied in parallel at identical points. The mean difference between the methods amounted 
to 1.26 dB for the A-weighted equivalent level and 1.04 dB for the C-weighted level, 
remaining within the technical accuracy limit of ±1.5 dB specified by IEC 61672. The 
improved method increased the efficiency of noise source detection within a 50-metre radius 
by 63.6 per cent and reduced labour costs twentyfold. On this basis the method is 
recommended for acoustic monitoring practice.