%0 Journal Article %T Time-Frequency Features of 3-D Sound Propagation in Wedge-Shaped Oceanic Waveguides %+ Laboratoire de Mecanique des Fluides et d'Acoustique (LMFA) %+ Lab-STICC_ENSTAB_CID_TOMS %A Sturm, Frederic %A Bonnel, Julien %< avec comité de lecture %@ 0364-9059 %J IEEE Journal of Oceanic Engineering %I Institute of Electrical and Electronics Engineers %V 41 %N 3 %P 731 - 739 %8 2015-12-17 %D 2015 %R 10.1109/JOE.2015.2461711 %K Terms—Normal mode propagation %K time-frequency analysis %K underwater acoustics %K 3-D propagation. %Z Engineering Sciences [physics]/Acoustics [physics.class-ph] %Z Engineering Sciences [physics]/Signal and Image processingJournal articles %X This paper considers propagation of low-frequencybroadband pulses in shallow water. It focuses on across-slopepropagation in wedge-shaped oceanic waveguides and onsingle hydrophone receiving configurations. In a low-frequencyshallow-water context, propagation is dispersive and usuallydescribed by modal theory. However, in the presence of a tiltedbottom, propagation is also affected by 3-D effects (horizontalrefractions). The paper shows that time-frequency analysis isa suitable tool to illustrate and understand 3-D propagation. Itillustrates the pertinence of the time-frequency analysis of 3-Dsignal by proposing an algorithm to estimate the seabed slopeusing a single receiver. The method is benchmarked on numericalsimulations, and successfully applied on small-scale experimentaldata. %G English %L hal-01255420 %U https://hal.science/hal-01255420 %~ UNIV-BREST %~ INSTITUT-TELECOM %~ ENSTA-BRETAGNE %~ CNRS %~ UNIV-LYON1 %~ UNIV-UBS %~ INSA-LYON %~ EC-LYON %~ ENSTA-BRETAGNE-STIC %~ LMFA %~ CELYA %~ ENIB %~ LAB-STICC_ENIB %~ LAB-STICC %~ INSA-GROUPE %~ UDL %~ UNIV-LYON %~ INSTITUTS-TELECOM