From June 27 to July 4, DEMASK was present at the international conference on the Effects of Noise on Aquatic Life in 2025 in Prague. The event gathered researchers and experts from all over the world to share progress and knowledge on the impact of human-generated sounds on aquatic species. DEMASK made a strong impression with multiple presentations and a poster, contributing to the broader understanding of how to manage underwater noise in marine ecosystems.
Scoring vulnerability to underwater noise
DEMASK presented the results of a newly developed vulnerability scoring system that supports the selection of indicator species to assess the impact of underwater noise. The system considers both biological sensitivity and ecological relevance, and can be adapted to other regional seas. Arienne Calonge, Anna-Sara Krång and Helena Eicher each presented a different part: fish, invertebrates, and marine mammals respectively.
The scoring system was well received and sparked engaging discussions on species selection, adaptability to other regions, and how this approach can be used to guide regional monitoring and policy. A key learning from the feedback is that there’s a strong need for transparent, science-based criteria to prioritise species and areas most affected by underwater noise. By openly presenting the methodology and assumptions behind the scoring, DEMASK fosters international dialogue and comparability, important steps toward consistent marine management strategies.
Testing effective solutions: modelling underwater noise mitigation
In addition to the biological assessments, Sander von Benda-Beckmann (TNO, Netherlands) presented model-based research into mitigation strategies for underwater noise caused by shipping. Using a synthetic shipping lane near the Dutch Wadden Islands and AIS ship data from January 2020, the team modelled how various mitigation measures affect the underwater soundscape. The model included different types of vessels and calculated monthly broadband sound pressure levels (SPLs) as a function of distance from the shipping lane.
The results clearly showed that RNL limits outperform slow steaming in reducing both permanent and peak sound levels. However, the most significant noise reduction, up to 16 dB, is achieved when all ships adopt a combination of DNV(E) quiet limit and slow steaming. These findings equip policymakers with quantifiable insights to guide future regulations and investments in ship design and operational practices.
A promising path forward
The DEMASK presence at Aquatic Noise 2025 generated strong interest among participants, especially regarding the adaptability of the scoring system and the policy relevance of the modelling work. Researchers, NGOs and government agencies expressed enthusiasm for future outputs and scientific publications.
The conference confirmed that underwater noise is a growing concern across regions and sectors. By combining ecological risk assessment with sound modelling, DEMASK helps bridge the gap between research and policy. The collaboration between partners—and the interaction with the broader scientific community—is key to building a healthy soundscape for the North Sea and other marine areas. Stay updated on DEMASK’s progress by subscribing to our newsletter or follow us on LinkedIn.