Associate Professor of Technical Science Zbigniew Ranachowski is Head of the Laboratory of Non-Destructive Testing at the Institute of Fundamental Technological Research at the Polish Academy of Sciences. Having completed his habilitation in 1998 at Cracow University of Science and Technology, Poland, he is the co-author of more than 60 scientific papers on the testing of various physical properties of solids with the application of modern diagnostic equipment. He is also a member of the Polish Acoustical Society and Secretary of the Scientific Council at the Institute of Fundamental Technological Research.Krzysztof Schabowicz is Associate Professor in the Civil Engineering Faculty at Wrocław University of Technology, Poland, having received his PhD in 2003 from the same institution. He is the author and co-author of three books, as well as over 100 other publications, and is a member of the Polish Association of Civil Engineers and Technicians and the Polish Association of Building Mycology. His research interests include ultrasonic tomography, impulse-response, and artificial intelligence algorithms, among others.