Objectives:The aim of this course is to give the students understanding of both Physics of acoustic waves and signal processing techniques, in order to be able to suggest which system is appropriate for given specifications, to predict its performances through simple models, to implement data processing algorithms and to interpret the results. The complementarity of deep learning techniques with physics based approach is highlighted.Contents:- Propagation of acoustic waves in shallow and deep water, scattering, Doppler effect.- Signal processing : positioning, detection and ranging, noise correlation, time reversal.