Table 3.

Model equations used to predict sound levels at different locations. L50 is the median sound level over the measurement duration, dist.min is the minimum distance to any major road, and category is the time period in which measurements were taken (pre-COVID-19, COVID-19 with non-leafed trees, and COVID-19 with leafed trees).

Model number	Equation
0	L50 ~ 1
1	L50 ~ log(dist.min)
2	L50 ~ Category
3	L50 ~ log(dist.min) + Category