Identification of Sound Power Levels and Surface Absorption Coefficients in Multi-Source Industrial Buildings by Using a Simplified Diffusion Model

MARTÍN E. SEQUEIRA; VÍCTOR H. CORTÍNEZ

Archives of Acoustics

De Gruyter Open Ltd.

Año: 2018 vol. 43 p. 93 - 102

0137-5075

This article deals with the identification of sound powers and absorption surface coefficients in multisourceindustrial buildings from the knowledge of the sound pressure levels (SPLs) at several monitoringpoints. This inverse problem is formulated as one of optimisation in which the objective function is thedifference between the measured and predicted SPLs. The methodology combines the use of a simplifiedacoustic diffusion model with the simulated annealing optimisation technique. The former is a recentlydeveloped model for estimating the SPLs in a fast and sufficiently accurate form. The low computationalcost of the model constitutes the major advantage for the optimisation procedure due to the great numberof simulations required. Numerical examples are given to show the efficiency of the proposed approach.