Dionysios T. G. Katerelos is an Associate Professor at the Department of Audio and Visual Arts, Ionian University (Lixouri, Greece), where he is a member of the Laboratory of Applied Musical Acoustics and Vibrations. He holds a Diploma (1995) and a Ph.D. (2004) in Mechanical Engineering from the University of Patras. His research addresses the mechanical and acoustical behaviour and modelling of composite and alternative materials, non-destructive testing, Raman spectroscopy, and musical-instrument technology and acoustics. He has participated in more than twenty research projects and has authored over fifty articles in journals, books and conference proceedings. His engineering background in the mechanics of materials underpins the structural interpretation of the ambient-vibration measurements reported in this work.