It would be difficult to understand the movement of water in a murky lake, or the swirling air inside a sealed chamber, without being able to see inside. For decades, scientists have relied on clever tricks to peer into such opaque environments, often adding particles or using optical techniques. But what if the fluid is too dark, too enclosed, or too delicate for those methods? A new approach, developed by researchers Lennart Kira and Dr. Jerome Noir of ETH Zurich, offers a compelling answer. It listens instead of looks. More

This audio is a summary of the paper “Full-waveform acoustic tomography for fluid temperature and flow,” in Experiments in Fluids, https://doi.org/10.1007/s00348-025-04068-z  

Funding for this research was provided by the Swiss National Science Foundation and the Simons Foundation. Open access funding and computational resources were provided by the Swiss Federal Institute of Technology Zurich. Publishing this audio was supported by the Innovedum Fund of ETH Zurich.

For further information, you can contact Lennart Kira at lennart.kira@eaps.ethz.ch or Dr. Jerome Noir at jerome.noir@eaps.ethz.ch

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