ABSTRACT
Although the microscale simulation techniques described in Chapter 4 can give a rather accurate prediction of urban sound propagation, it is normally impractical to apply these algorithms on a large scale such as a whole city. Based on a series of simplified algorithms, a number of software packages have been developed for large area noise mapping. This chapter first describes main algorithms of noise mapping techniques (Section 5.1). It then discusses the accuracy, efficiency, and strategic application of noise mapping techniques through case studies (Section 5.2). This is followed by a brief description of some noise mapping applications (Section 5.3). Finally, this chapter describes some other recently developed models for medium-and large-scale urban areas, typically a series of urban elements such as street canyons (Section 5.4).
