Die Forscher verwendeten einen Millimeter-Wellen-Radarsensor, um Gespräche aus den Schwingungen von Smartphones zu sammeln und ein Spracherkennungsmodell anzupassen, um die Schwingungen in erkennbare Sprachtranskriptionen zu dekodieren
https://www.psu.edu/news/engineering/story/conversations-remotely-detected-cell-phone-vibrations-researchers-report
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> An emerging form of surveillance, “wireless-tapping,” explores the possibility of remotely deciphering conversations from the tiny vibrations produced by a cell phone’s earpiece. With the goal of protecting users’ privacy from potential bad actors, a team of computer science researchers at Penn State demonstrated that transcriptions of phone calls can be generated from radar **measurements taken up to three meters, or about 10 feet, from a phone. While accuracy remains limited — around 60% for a vocabulary of up to 10,000** — the findings raise important questions about future privacy risks.
[Wireless-Tap: Automatic Transcription of Phone Calls Using Millimeter-Wave Radar Sensing | 18th ACM Conference on Security and Privacy in Wireless and Mobile Networks](https://dl.acm.org/doi/abs/10.1145/3734477.3734708)
Espionage game changer right there, and good excuse to never answer the phone and stick to texting.
There was another study a while back using high speed cameras to look at pliable objects, like a crisps bag, during a conversation and use that to replicate the sound waves.
And a similar thing with a laser optic on a glass pane.
Anyway, assume all audible noises can be intercepted.