Abstract
An underwater noise is the most pervasive type of physical energy that spreads in underwater marine environment. The concerns regarding man-made underwater noise effects on the aquatic animals became prominent within scientific communities. The determination of underwater noise levels became very actual either for environmental monitoring or scientific research purposes. Various tools for acquisition of the underwater sound as well, modelling became available, although some techniques are costly and requires special considerations. One of the examples are the sound recording devices containing hydrophones along with digital sound acquisition systems used for recording of ambient (continuous) underwater sounds. By the date there are already developed the international and European standards for monitoring the long term (yearly) underwater continuous noise levels. However, the techniques known to be able to record the short and mid-term noise levels can serve for the research purposes greatly. In this research the cost efficient autonomous underwater sound recorder was developed, with the purpose to record an ambient underwater noise continuously and autonomously for the periods of up to 15 days, following the already known methods. In this paper we present the steps of the development of the autonomous recorder, its features and capabilities as well, calibration results of the underwater sound recording system.
Highlights
There are many kinds of anthropogenic energy that human activities introduce into the marine environment including sound, light and electromagnetic, heat as well, radioactive energy
The techniques known to be able to record the short and mid-term noise levels can serve for the research purposes as well, especially in the shallow water areas and can be developed for affordable price
The developed autonomous underwater sound recording system is depicted in the Figure 2
Summary
There are many kinds of anthropogenic energy that human activities introduce into the marine environment including sound, light and electromagnetic, heat as well, radioactive energy. The global shipping trends inevitably are increasing, where the number and size of commercial vessels in the world’s merchant fleet have increased during the last 50 years significantly (Hildebrand, 2009). This increase in global shipping trends has raised the concern that resulting radiated underwater noise energy is causing widespread behavioural and physiological effects on marine animals (Merchant et al, 2019). Due to these concerns the anthropogenic underwater noise measurements became actual in the light of environmental protection and wildlife conservation. The later developments of lead zirconate titanate enabled the development of the wide frequency band hydrophones that are used widely to investigate underwater sounds (Carey & Evans, 2011)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
