Evaluation of Noise Emissions and Cutting Performance of Chainsaws for Small Scale Forestry Operations

Abstract

Exposure to high levels of noise over time can cause effects on the health of operators. Furthermore, the use of chainsaws in urban areas during the maintenance of urban vegetation, contributes to the noise pollution in cities. This paper reports the results of tests carried out with the aim of evaluating the levels of exposure to noise caused by three light chainsaws for pruning (two electric powered and one with an endothermic engine) and two pole chainsaws (one electric and one endothermic). The equipment was tested in cutting operations of fresh hardwood and softwood logs of different species. The acquisition of sound pressure values was carried out according to the Italian Legislative Decree 81/08, using a certified instrumental chain. The measurements were performed with the equipment in three different conditions: engine at idle (only for the internal combustion one), at maximum and during cutting. To evaluate the cutting performance, the cutting times were measured taking into account the diameter of the wood samples, then expressing the results in seconds cm−2. The results showed that the tested electric chainsaws, during cutting, have comparable noise emission and cutting velocity, while obviously those of the petrol chainsaw are much higher. A significant difference was found in the average dB(A) values, considering both types of woods used, between the two electric chainsaws. However, electrical equipment also showed high levels of noise emissions that must be considered in calculating the daily exposure levels (LEX, 8 h), according to Italian law (Legislative Decree 81/2008).