Uso da geoestatística para avaliar a captação automática dos níveis de pressão sonora em instalações de creche para suínos

Abstract

The objective of this work was to study the influence of decibelimeters distribution in the automatic acquisition of sound pressure levels in pig nursery facilities. The experiment was conducted in a nursering room of a commercial swine’s facility situated in the city of Monte Mor, State of São Paulo, Brazil. The room was divided in ten identical quadrants and the geometrical center of each quadrant was installed the decibelimeters. Geostatistics was used to evaluate the spatial dependence among the decibelimeters and to predict sound pressure levels in the places that they were not installed. Data were analyzed by the correlation among decibelimeters and through geostatistics, being possible to affirm that there was no spatial dependence between recording points of the sound pressure levels. Through interpolation of registration points using kriging process, was possible to predict sound pressure levels in places with no decibelimeters inside the facility. It was verified homogeneity in the sound pressure levels propagation inside the facility, concluding that to the evaluated environment, the use of only one equipment to the automatic registration of sound pressure levels is enough.