John Mourjopoulos is Professor in Electroacoustics and Digital Audio Technology at the Electrical and Computer Engineering Department of the University of Patras in Greece. He has obtained BSc degree in engineering from Coventry University and MSc and PhD degrees in 1980 and 1985, from the Institute of Sound and Vibration Research (ISVR), at Southampton University. He has authored and presented more that 180 papers in refereed international Journals and Conferences and was awarded the Fellowship of the Audio Engineering Society (AES). His research covers many aspects of acoustic and digital audio systems with emphasis in the application of signal processing methods for audio signals. He has been also involved in the measurement, modelling and analysis of the acoustics of ancient theatres. He is a member of the IEEE, the Audio Engineering Society and of the Hellenic Institute of Acoustics.