Underwater Acoustic Sensors and Applications

Dear Colleagues,

Underwater acoustic sensors play a relevant role in several fields of knowledge in relation with underwater environment. Underwater acoustics has been revealed as a useful tool with countless applications allowing to perform studies of biomass calculations for fishering purposes, ecological assessment in relation with noise pollution, bioacoustic studies related with marine mammals or soundscape assesment using acoustic indicators, among other applications. In adittion, technological development related with engineering applications is constantly evolving, covering topics from underwater wireless communicactions, to positioning systems with high accuracy. The evaluation of underwater noise and the study of its influence on the environment has become a subject of high priority during the last few years thanks to the efforts of organizations and public institutions like the World Health Organization, the International Maritime Organization or the European Union through the implementation of Marine Strategy Frameworok Directive (2017/56/EC; hereafter MSFD).
The main objective of this issue is to put together the research activities, developments, and new applications in the field of underwater acoustics sensors and signal processing techniques.
Articles could include but are not limited to the following topics:

• New developments on monitoring passive acoustic systems;
• Activities on new metrics related to underwater noise assessment;
• Calibration of passive acoustic devices, especially at low frequencies;
• Signal processing techniques related to underwater noise applications;
• Monitoring systems applied to bioacoustics studies (from marine mammals to soundscape studies);
• Develop particle motion devices (from measuring to calibration standards proposals);
• Industrial applications of underwater acoustic devices;
• Biomass estimation, and activities related to monitoring of fish farms using ultrasound projectors/receivers;
• Mitigation measurements, linked to impulsive noise;
• Activities linked to standardization of ship noise signature measurements. 

Dr. Manuel Bou-Cabo
Guest Editor

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