"Because standard fiber alone is not sensitive enough to capture airborne speech, the researchers engineered a custom “Sensory Receptor” — a hollow PET (polyethylene terephthalate) cylinder, 65mm in diameter, with 15 meters of optical fiber tightly wound around it."
this post was submitted on 08 Apr 2026
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Fiber Optic Cables Turned Into Hidden Microphones to Secretly Spy on Your Conversations
(cybersecuritynews.com)
The level of paranoia I don't need, is my junction box listening to me

This is actually giving me ideas for non-nefarious implementation in my own home.
Same.
(Your home I mean.)
Can you please tell the class your big plan? We are all curious now.
Basically usage with Home Assistant as a mic for voice control in areas that present difficulties for power (outdoors especially) or high pitched noise (near my server rack).