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Description
This paper assesses environmental noise generated by industrial sources at a production facilites located in a mixed residential–industrial urban area. The objectives were to identify the dominant noise sources, evaluate their contribution at the most exposed residential receivers, and propose mitigation measures capable of reducing the noise impact to acceptable levels. The study combined field measurements of total and residual noise, near-source sound pressure level measurements, and technical data from equipment specifications. An acoustic propagation model was developed and calibrated using measured data. The dominant sources were identified as an elevated exhaust fan, a compressor unit near the steam exhaust, a compressor room with ventilation openings, a mill unit, and cooling-related systems. Nighttime measurements showed an assessed noise level of 50 dB(A) and a residual noise level of 40 dB(A), indicating the need for further reduction of industrial noise emissions. Based on the analysis, a phased mitigation strategy was proposed, including acoustic louvers, absorbent treatment of ducts and openings, vibration isolation of motors, and improved sound insulation of façade openings. Model results indicate that the proposed measures can reduce the contribution of the dominant sources so that the residual noise level at critical residential locations would not increase by more than 1 dB(A). The findings confirm the technical feasibility of effective industrial noise control in densely built urban environments.