Paul J. T. Filippi was a Directeur de Recherche at the Laboratoire de Mécanique et d’Acoustique (LMA-CNRS, Marseille) until the end of 1999. He was in charge of the Formation Doctorale d’Acoustique et Dynamique des Vibrations, which is, now, the Master de Mécanique at the University of Provence. He has published many papers on acoustics, vibrations of thin structures and vibro-acoustics.