Sound Propagation Outdoors: Comparison Between Numerical Previsions And Experimental Results
Free (open access)
A. Farina & L. Maffei
The aim of this work is to test the accuracy of numerical previsions made following two different approaches: the first is an Image Source code, built up around the computing formulas contained in the new ISO DIS standard 9613 parts 1 and 2. The second one is a general purpose Pyramid Tracing code, called RAMSETE, that is suitable both for indoor and outdoor simulations. The test case was chosen in an area containing all the most interesting acoustic phenomena: large distance propagation over absorbing soil, shielding by embankments and buildings, multiple reflections on reflecting facades. Only adverse atmospheric conditions were not taken into account (strong wind, inverted temperature gradient).