A new basic analysis of pulsed photoacoustic signal using the finite differences method N. Benamar, E. Chatri, F. Lahjomri and R. M. Leblanc Eur. Phys. J. Appl. Phys., 28 2 (2004) 255-262 Published online: 25 June 2004 DOI: 10.1051/epjap:2004159