Verification of the accuracy of the Pyramid Tracing algorithm by comparison with experimental measurements by objective parameters

The paper summarise the results of a large verification experiment, in which the numerical previsions obtained through a new Pyramid Tracing program are compared with experimental results coming from very different geometric cases. Firstly the Pyramid Tracing implementation made in the RAMSETE program is briefly explained, together with the particular assumptions made on the sound source directivity and on the acoustic behaviour of the surfaces. Then some experimental cases are introduced: for each of them, a numerical simulation of a simplified geometry is conducted, and the numerical results are compared with the experimental ones in terms of standard objective acoustic parameters (computed accordingly to ISO/DIS 3382). The discrepancies are stressed out, and the sensitivity of the numerical results with the variation of the computational parameters is discussed.