Figure 4. Boxplot representing the differences in intensity (dB; sound pressure level) recorded between environments (Natural and Highway), in the municipality of Ilhéus, Bahia, Brazil. The boxplots show the median (middle line), first and third quartiles (upper and lower bounds of the box), the points presented in the boxplot represent each noise value in decibels for each individual and the extreme lines indicate the non-outlier range. The red points represent the mean values.