École Nationale Supérieure de
Techniques Avancées

Résumé

The growth of human activity on the seas is continuously increasing through: com- mercial shipping, offshore wind-farms or the extraction of underwater resources. This activity creates noise pollution which negatively impacts marine ecosystems. It is important to measure this impact in order to be able to act in the future. Cyprus Subsea wants to develop a service based on a software solution to analyse in real time noise pollution through the use of an hydrophone loaded on seagliders. My mission was to meet this objective and to develop the software on the nano computer loaded on the glider. The challenge was difficult given the constraint of the limited computing capacity of this nano computer. I have worked with two algorithms which are presented: one measures the ambient noise level on the two third octave frequency bands recommended by the EU Commission, the second one, based on Matching Pursuit, identifies sound sources from a database of known sounds. These algorithms have been tested and gave convincing results. They now need to be im- plemented on the seaglider and the database of known sounds has to be enriched.