Effectiveness of Organic Waste Material Noise Dampening in Minimizing Noise Levels in Animal Feed Industry Machinery

¹ Occupational Health and Safety University Sebelas Maret, Ir Sutami 36A Kentingan, Jebres, Surakarta 57123 Indonesia; Environmental Science Doctoral Program University Brawijaya St Mayjen Haryono 169, Malang 65144 Indonesia
² Occupational Health and Safety University Sebelas Maret, Ir Sutami 36A Kentingan, Jebres, Surakarta 57123 Indonesia
^3,4 Environmental Science Doctoral Program, University Brawijaya St Mayjen Haryono 169, Malang 65144 Indonesia

^* Corresponding author: sev1ana_er@staff.uns.ac.id, seviana_rw@student.ub.ac.id

Abstract

Animal feed production machine specially in pellet machine to produce cylindrical animal feed, there is a pressing screw which high noise intensity. The industry has production machinery with high noise exposure and organic waste that can function as noise damping material. The aims of study to determine the effectiveness of noise absorbers from organic materials on machines. Methods of research is experimental. The object used the production machinery that will be intervened with organic damper on machines then measured by instruments: Sound Level Meter (noise intensity) and ArcGis 10.3 application for noise mapping areas. Analysis of research data with Wilcoxon test. The results showed that the noise intensity of machines exceeded the threshold limited value, an average of 96,75 and 97,35 dBA per 8 hours/day with the most red color zones. After using noise dampers, the noise intensity on the machine decreased to an average of 84,85 and 85,25 dBA/8 hours/day with the most green color zones. Statistical test results with a p-value of 0.000 show that there is a difference before and after the application of noise absorbers on machines. This study shows the effectiveness of organic waste material noise absorbers in minimizing noise levels in animal feed industry machinery.