This work applied acoustic technique to relate the response of a signal sound to different surfaces, measured in equivalent sound pressure level, with the factors governing soil loss. Four erosion plots in reduced scale (2.0 x 12.5 m) were built on the field. One plot contained barren soil while the others contained forage grass (Brachiaria), corn and temporary crop soybean/wheat, following the seasonal agricultural practices implemented in the watershed where the study was conducted. Pink noise was used in the measurements of the acoustic system to collect information regarding the equivalent sound pressure level (L EQ) of incident and reflected waves. The results of the noise tests indicated that there was no differentiation between the type of ground cover and the acoustic absorption coefficient measured in L EQ.
equivalent sound pressure level (L EQ) loss of soil; pink noise