Atlantic Canadian companies trying to turn down dial on ocean noise
Noise pollution in the world’s oceans is a growing concern, with startups in Atlantic Canada looking to technological advancements to mitigate its impact on marine animals. The rise in ocean noise is primarily attributed to industrial and military activities, particularly shipping. As marine traffic increases, noise levels are rising by approximately three decibels per decade, resulting in a doubling of sound intensity.
Marine animals like whales and dolphins heavily rely on sound for navigation, mating, feeding, and communication. The escalating background noise limits their communication range, causing stress and potential long-term dangers. Lindy Weilgart, a senior ocean policy consultant and adjunct professor at Dalhousie University, emphasized the detrimental effects of noise pollution on marine life, stating that sound can travel thousands of kilometers underwater, affecting various species.
One startup in Dartmouth, Nova Scotia, is working on a solution to cancel out ship noise. Rising Tide BioAcoustics is developing a noise-cancelling system that utilizes advanced technology similar to noise-cancelling headphones. The system identifies and cancels out low-frequency noise produced by ships, aiming to reduce the harmful effects on marine animals, particularly whales.
Another company, SeafarerAI, is using artificial intelligence to address underwater noise challenges in ports. By deploying hydrophones and algorithms, the startup helps ports identify and categorize sound sources, enabling them to take measures to reduce noise pollution. These technologies could also aid in minimizing disturbances to marine life during shipping activities.
GIT Coatings, a company in Dartmouth, has developed hull coatings that not only reduce drag and biofouling but also mitigate noise from propellers. By insulating the hull and reducing cavitation noise, the company aims to decrease the overall noise emitted by ships. With support from Canada’s ocean supercluster, GIT Coatings has tested these approaches on vessels, observing decreased noise levels and potential environmental benefits.
While efforts are being made to address ocean noise pollution, binding regulations may be necessary to drive impactful solutions. Weilgart suggests measures like reducing ship speed and improving efficiency to decrease noise pollution. As Canada introduces draft strategies and action plans to tackle ocean noise, there is optimism for progress in mitigating the adverse effects of noise pollution on marine ecosystems. By prioritizing solutions that address both noise pollution and greenhouse gas emissions, a more sustainable future for marine life can be achieved.
