Are ultra low frequency waves suitable for detection?

Seismic processing tools have been developed mainly by petroleum research. As underwater sources are now at low frequency (<100 Hz), most of these methods can be adapted or directly used to underwater source detection in shallow water. In this paper, we focus on detection using ultra low frequency (ULF) waves. The first step is to know how these waves propagate and which valuable information they can carry. A study of the propagation between an underwater source and sensors laid on the floor is proposed. Different transformations (velocity correction, frequency-wavenumber transformation) are used to estimate geoacoustical parameters on a real data set. Wave propagation simulation in a heterogeneous medium using finite-difference algorithm is made in a similar environment and to validate the methods, simulated geoacoustical parameters are estimated.