The sensitivity estimation in simulation modeling by changing the "diffuse reflection coefficient” input

The output data sensitivity referred to the input variation in a calculation code developed for the Room Acoustics analysis is the main goal of the paper; in particular for this study CATT-Acoustic commercial software is used. The paper is focused on the variation of the sound perception connected to the reverberation time output data by changing the diffuse reflection coefficient input data and the degree of model geometric discretization of its volume. Consequence is the identification of a trend to estimate the output variation in relation with the diffuse reflection coefficient values. It represents a support in the analysis of the acoustic response of confined spaces, especially in the concept phase, when the real space doesn’t exist yet, and there is no possibility to carry out measurements on site to compare with the simulation model results.