Ocean waves possess significant renewable energy potential, estimated between 50 to 80 trillion watts globally. Recent research from Cardiff University in 2025 indicates that underwater sound waves can amplify surface waves, thereby improving energy capture. This innovation seeks to address the efficiency limitations of current wave energy technologies, especially in deep water environments.
The study, published in the Journal of Fluid Mechanics, details how acoustic waves, whether generated by earthquakes or other phenomena, can transfer energy to surface waves through a process called triad resonance. This interaction can increase the amplitude of surface waves by over 30%, potentially boosting electricity production in wave turbines. The research team suggests utilizing a tuned acoustic wave generator, possibly powered by the waves themselves, to maximize efficiency and minimize emissions.
Tsunami Early Warning Systems
Furthermore, monitoring underwater acoustic waves could enhance tsunami early-warning systems. Hydrophones, which are underwater microphones, can detect acoustic waves from tsunami-causing events more rapidly and comprehensively than current seismometer and buoy systems. A network of approximately 30 hydrophone stations could cover global high-risk areas, aiding coastal communities and supporting UNESCO's goal to have all at-risk coastal communities Tsunami Ready by 2030.