4. Conclusion

The most widely used tool for signal analysis is the Fourier transform. Unfortunately, in many configurations, the existence of intermittent and inconsistent phenomena results in broadband spectra that are difficult to interpret. For better analysis, it is necessary to follow the temporal evolution of these phenomena. The use of time-frequency methods therefore seems the ideal solution.

Since the 1980s, the use of these information processing methods has made great strides in various fields of mathematics and physics, as evidenced by the number of books and collections of articles published. Numerous processing software packages are available on the market, but interpretation of the results obtained is not always straightforward.

Among the existing techniques likely to provide answers to the problems posed, it is possible to list a certain...