This repository contains data from the sonic test experimental campaign carried out in eight structures at various location in Croatia. The data set is structured in 3 levels of folders: - At first level, the 8 folders correspond to the 8 tested buildings. - At second level, for each building, each folder corresponds to a different test location within the building, e.g. "Data FJ1". - At third level, for each location, each folder corresponds to a different setup (i.e. distance and location of hammer and accelerometer), , e.g. "FJ1 1-2". Sonic data are presented in .txt files in three columns corresponding to the time, the hammer (emitter) and the accelerometer (receptor), respectively. Please cite the following related publication: Ortega J, Stepinac M, Lulic L, Nuñez Garcia M, Saloustros S, Aranha C, Greco F, Correlation between sonic pulse velocity and flat-jack tests for the estimation of the elastic properties of unreinforced brick masonry, under review (2022)