This new method was used to successfully complete the world’s largest noise map, the END noise mapping of the railways throughout Germany. 12,000 kilometers of railway were mapped, which included 11 GB of terrain information, 8 million buildings and 36 million receiver points. All of this was calculated on 4 personal computers in less than 30 days run time using 32‐bit WindowsXP.
The Dynamic Search method makes it possible to calculate huge noise maps with complex geometry, and to simulate details previously not possible in noise control programs. This method was adapted not only for rail noise calculations, but also for other noise source types. The Dynamic Search method, unique to SoundPLAN noise and air pollution evaluation software, makes it practical for consultants to map any size project regardless of terrain, with any number of noise types (road, rail, aircraft, industry, leisure…), and unlimited number of sources, in a timely, efficient manner as demonstrated with the noise mapping of the German railway system.