Computing the soud reduction index for a hollow clay blocks wall considerign an orthotropic behaviour

MatLab code for predicting the sound insulation of a hollow clay blocks wall adpated from the following research: Granzotto N, Di Bella A, Piana EA. Prediction of the sound reduction index of clay hollow brick walls. Building Acoustics. 2020;27(2):155-168. doi:10.1177/1351010X20903144