Variations of road traffic noise in residential areas.

The ability to predict road noise in urban area is important. The community noise equivalent level (L(den)) varies from day to day (weekdays, weekends, holidays, etc.). There is a need to compromise between the accuracy in the determination of L(den) and limited resources of input data, the measuring equipment, and time. The problem can be managed using the method proposed in this study. It requires only one short-term measurement of the time-average sound level, L(Aeq,T).