How Noisy Is Clean Power?

Why It Matters

Accurate noise forecasts are essential to protect marine ecosystems and to secure regulatory approval for large‑scale tidal projects, thereby accelerating clean‑energy deployment.

Key Takeaways

• Manchester launches (not)NOISY to model tidal turbine noise
• Tool predicts acoustic footprint up to eight kilometres
• Noise modeling supports regulators and developers
• AI‑assisted models simulate real tidal conditions
• Testing planned at sites in Scotland, Wales, France

Pulse Analysis

Tidal‑stream energy is emerging as a cornerstone of the United Kingdom’s renewable portfolio because it delivers a steady, predictable power output unlike intermittent wind or solar. As the sector moves beyond pilot turbines toward arrays of ten or more machines, the cumulative environmental footprint—particularly underwater acoustic emissions—has become a key barrier. Marine mammals, fish and seabirds can be sensitive to low‑frequency noise that travels for kilometres, potentially disrupting feeding, migration and communication. Yet, until now, developers have lacked reliable tools to quantify that acoustic footprint, leaving regulators uncertain about acceptable thresholds.

The University of Manchester’s (not)NOISY programme tackles this gap by coupling high‑resolution hydrodynamic simulations with machine‑learning algorithms that emulate real‑world tidal conditions. These models can map noise propagation for different turbine designs, spacing configurations and seabed topographies, delivering predictions of sound pressure levels out to eight kilometres. By validating the framework at established sites in Scotland, Wales and northern France, the team ensures that the outputs reflect diverse oceanographic regimes. The AI‑assisted approach also accelerates scenario testing, allowing developers to optimise layouts that minimise acoustic impact without sacrificing energy yield.

Providing a scientifically robust acoustic map equips policymakers with the data needed to craft targeted mitigation guidelines and licensing criteria, reducing project delays and legal challenges. For the industry, the ability to demonstrate low‑impact designs can unlock financing and community support, accelerating the commercial roll‑out of tidal farms that complement offshore wind and solar. Moreover, the methodology sets a precedent for other marine renewable technologies, such as wave energy converters, where noise concerns are similarly under‑explored. In sum, (not)NOISY could turn one of the sector’s biggest uncertainties into a manageable design parameter, bolstering the clean‑energy transition.