Could a sound visor reveal hidden structural defects before they turn into disasters?
In short: Physicist Rachel Edwards explores the future of non-destructive testing. By moving beyond traditional ultrasound methods that require messy gel, researchers are developing new ways to use lasers and electricity to visualize sound waves as they interact with cracks and corrosion in critical infrastructure.
Non-destructive testing is vital for maintaining safety in complex systems like power stations, railway lines, and rollercoasters. While medical-style ultrasound typically relies on a gel couplant to transmit sound, Professor Rachel Edwards of the University of Warwick is investigating methods to eliminate this requirement. By generating and detecting sound through lasers or electricity, engineers can inspect materials ranging from semiconductor membranes to massive railway tracks without physical contact.
The research aims to create a 'sound VISOR' that allows engineers to see sound waves ripple through a structure in real time. This capability would provide a transformative approach to monitoring structural integrity, allowing for the detection of hidden dangers before they lead to failure. This work, presented at the Royal Institution on 15 November 2025, highlights how advanced physics can revolutionize maintenance and safety protocols across multiple industrial sectors.
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- Summary by Intellect · source: Engineering's secret weapon: How ultrasound spots structural problems - with Rachel Edwards
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