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In A Surprising Discovery, Researchers From Cardiff University Have Shown That Sound Waves Generated On The Ocean Floor Can Interfere With Tsunami Behavior, Reducing Their Strength
A new study indicates that oceanic sound waves can be used to reduce the strength of tsunamis. The research, published in the Journal of Fluid Mechanics, reveals a type of interaction between different waves at sea that can allow for the control of the energy of these dangerous formations.
Triad Resonance May Be Key To Energy Control
The phenomenon described by the researchers is known as triad resonance. It occurs when two sound waves and one surface gravity wave interact in a specific way.
So far, it was believed that these waves had no relation, as they move at very different speeds.
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According to Dr. Usama Kadri, the lead author of the study and a researcher at Cardiff University, the right alignment between the waves allows them to exchange energy.
This can reduce the strength of a tsunami or, in another use, increase the power of waves used for clean energy generation.
Kadri states that the process creates a form of “conversation” between the waves, and this energy exchange can be directed.
For him, this represents a physics-based alternative to reducing tsunami energy, something that current approaches, such as physical barriers and alert systems, cannot do directly.
Water Depth Influences The Outcome
The research also highlights the importance of ocean depth in this process. In shallow waters, the energy transfer between waves is greater.
This aligns with the locations where tsunamis tend to cause more destruction, which could facilitate the practical application of the technique.
“Shallow waters drastically increase energy transfer, aligning with the location where tsunamis become more destructive,” Kadri explained.
The discovery of an “ideal point” for this type of interaction could simplify the use of the technology in real situations, according to the authors.
Ocean Energy Could Benefit
In addition to the tsunami issue, scientists also see a promising future for using this technique in renewable energy generation.
Currently, technologies for capturing energy from waves are still not very efficient, especially in deeper areas.
By amplifying surface waves, it would be possible to make the systems more effective. The Cardiff team is now seeking to verify their theory in a controlled environment.
“Once laboratory validation is achieved, designing real-scale acoustic generators becomes an ‘only’ engineering challenge,” concluded Dr. Kadri.
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