[HN Gopher] Conversations remotely detected from cell phone vibr...
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       Conversations remotely detected from cell phone vibrations,
       researchers report
        
       Author : giuliomagnifico
       Score  : 16 points
       Date   : 2025-08-10 18:14 UTC (4 hours ago)
        
 (HTM) web link (www.psu.edu)
 (TXT) w3m dump (www.psu.edu)
        
       | lolc wrote:
       | It's interesting that measuring speech vibration is possible, but
       | on the whole I don't see this as viable attack. One would need to
       | get real close to a target, the cited 60% accuracy is at 50 cm
       | distance. At 300 cm they report 2% which seems on the level of
       | guessing words randomly.
       | 
       | The "remotely" in the title is no warranted in my view. Of course
       | there may be ways to improve on their results. But so far it
       | seems to me that a highly directional microphone would outperform
       | the radar at any distance. One interesting aspect here is how
       | sensitive the attack is to ambient noise. So maybe sitting close
       | to a target with a radar hidden in headphones, one could glean
       | some words even in a noisy environment like a subway. But I'd
       | still put my money on a microphone performing better in that
       | environment.
       | 
       | Now I wonder whether the attack would work better on headphones.
       | They are smaller and should vibrate more. On the other hand the
       | surface is smaller, so on the whole they might not provide more
       | signal to a radar.
        
       | _trampeltier wrote:
       | I think the thing with a camera, and detecting the movment of
       | plants and chipsbag around to recreate the sound was much more
       | impressive.
        
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       (page generated 2025-08-10 23:00 UTC)