Abstract
This paper presents a three-dimensional mathematical model which characterizes the variation of sound pressure level
propagation and the variation of attenuation of the sound pressure level propagated in an enclosed space. The variable taken into
consideration both in the experiments and in the mathematical modeling were: the positions of the acoustic screen to noise
source; the height of the microphone to record the sound pressure level for a variable number of walls. The mathematical model
is based on the experimental data obtained in laboratory, using an experimental setup, which comprises a variable number of
walls as acoustic screen.