Industrial noise assessment and modelling in Siauliai/ Pramoninio triuksmo vertinimas ir modeliavimas Siauliu mieste

One of the most discussed problems of industry is noise pollution. A number of powerful machinery make noise in the industry sector and can cause plenty of diseases for people working in this sector. An experiment has been conducted in the territory of the company 'Energy of Siauliai'. An assessment was carried out applying noise measurement equipment MS6700. Modelling was done using the modelling program IMMI. A cartographical map of noise was produced and the measures of modelling results were compared. Difference in modelling and measuring results was in 0-4 dBA, range 0-7.8%. Such discrepancy could be caused by other noise pollution sources that are not included in the settings of the programme IMMI, etc. transport. Modelling results were compared with hygiene standard HN33:2007; however, they do not exceed the established standards, and thus this noise pollution does not have influence on human health. Nevertheless, we need to choose appropriate means for protecting people working in this industry territory. Keywords: industrial noise, noise measurement equipment MS6700, programme IMMI, company "Energy of Siauliai". Intensyvus--virsijantis 80 dBA--triuksmas, veikdamas darbuotoja visa darbo diena, pazeidzia klausos organo funkcija, kuri per poilsiui tarp darbo valandu skirta laika atkuriama. 80-90 dBA garso slegio poveikis per 8 val. garsini jautruma sumazina 4-7 decibelais, o 100-110 dBA triuksmas--12-15 decibelu. Siame darbe, naudojant triuksmo modeliavimo programa IMMI, modeliuojamas AB "Siauliu energija" pietines katilines dvieju pagrindiniu traukos ventiliatoriu keliamas triuksmas bei jo sklaida imones teritorijoje. Sudaromas triuksmo sklaidos zemelapis, kurio rezultatu patikimumas ivertinamas atliekant matavimus garso matuokliu MS6700. Apskaiciavus matavimo ir modeliavimo rezultatu neatitikti, gauta, kad 2,4 dBA, t. y. 4,3%, matavimo rezultatai virsija modeliavimo rezultatus. Uz teritorijos ribu triuksmo lygis kito nuo 35 iki 55 dBA ir nevirsija HN 33:2007 leistinojo triuksmo lygio (Ldvn 65 dBA, o Ln--55 dBA). Imone yra Siauliu miesto pietiniame pramoniniame rajone, todel imones irenginiu keliamas triuksmas nedaro neigiamo poveikio miesto gyventoju sveikatai, taciau triuksma sumazinti reikia del darbuotoju, dirbanciu imones teritorijoje, sveikatos. Reiksminiai zodziai: pramoninis triuksmas, garso matuoklis MS6700, programa IMMI, AB "Siauliu energija".