Acoustic Drone Detection On The Cheap With ESP32

We don’t usually speculate on the true identity of the hackers behind these projects, but when [TN666]’s accoustic drone-detector crossed our desk with the name “Batear”, we…

Hackaday
Detecting Helium Leaks With Sound In A Physics-Based Sensor

Helium is inert, which makes it useful in a lot of different industries. But helium’s colorless and odorless non-reactivity also means traditional gas sensing methods don’t work. Specia…

Hackaday

[en] #Imaging the ground with #telecommunication|s cables

"... used the #MIT #fiber optic cable network to successfully image the ground underneath campus using a method known as distributed acoustic sensing (#DAS)."

"Information like this is critical for regions that are susceptible to destructive #earthquake|s and other #seismic hazards ..."

https://news.mit.edu/2025/how-telecommunications-cables-can-image-ground-beneath-us-0204

#ResearchHighlights #research #fiberoptic #acousticsensing

How telecommunications cables can image the ground beneath us

Using MIT’s fiber optic infrastructure, PhD student Hilary Chang imaged the ground underneath campus using distributed acoustic sensing and dark fiber cables, a cost-effective method for determining the seismic hazard of an area.

MIT News | Massachusetts Institute of Technology