[HN Gopher] Moving objects precisely with sound
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       Moving objects precisely with sound
        
       Author : geox
       Score  : 92 points
       Date   : 2024-06-26 09:18 UTC (2 days ago)
        
 (HTM) web link (actu.epfl.ch)
 (TXT) w3m dump (actu.epfl.ch)
        
       | InDubioProRubio wrote:
       | And every surface can be a speaker with lasers..
        
         | uvesten wrote:
         | ...and a microphone?
        
           | Piskvorrr wrote:
           | Yes. IIRC there were some eavesdropping cases where sound was
           | read from a fairly remote glass pane.
        
             | keville wrote:
             | https://news.mit.edu/2014/algorithm-recovers-speech-from-
             | vib...
             | 
             | How about _through_ a glass pane, off of a bag of chips?
        
               | Piskvorrr wrote:
               | Oh, cool. That's a decade ago, though - technology must
               | have progressed, surely.
        
         | salomonk_mur wrote:
         | How?
        
       | deeel wrote:
       | One step closer to learning how they made the pyramids.
        
         | aduitsis wrote:
         | One step closer to the sonic screwdriver from Doctor Who.
        
       | consultutah wrote:
       | I'm actually more interested in doing this at the larger macro
       | scale than the micro scale. Imagine the ability to lift heavy
       | objects with only sound. Weight rooms would look entirely
       | different :)
        
         | swayvil wrote:
         | Holo display. A bucket of glass beads suspended in air.
        
           | codelobe wrote:
           | Holo Display: generate the refractive voxel via ultrasonic
           | convergent propagation fringe pattern, and light the voxel
           | with IR that becomes higher frequency visible light color at
           | point of interfearance/intersection.
           | 
           | PrHoteph: hyperplanes are your friends, may they guide your
           | long distance acoustic whisper / ultrasonic voxel
           | intersections.
        
         | nico wrote:
         | This guy made something along those lines. He calls it
         | "orthosonic lift": https://youtu.be/H-88gsWLTac?t=126
         | 
         | Also check out this "acoustic streaming" video:
         | https://www.youtube.com/watch?v=-ZE2Mnzc7mA
        
       | swayvil wrote:
       | This strikes me as a good application for machine learning. Throw
       | random waves at the object. Filter for useful movements.
        
       | dekhn wrote:
       | Just saw one of these in the lab: https://www.beckman.com/liquid-
       | handlers/echo-525 it costs half a mil
        
       | Optimal_Persona wrote:
       | Nothing new, this has existed in my household for the last 20 odd
       | years -
       | 
       | "Hey honey, move this thing over there. No, an inch and a half to
       | the left. NOPE - back to the right a few mm, and forward a
       | little. Yup - wait...just a little bit more. There, you've got
       | it!"
        
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       (page generated 2024-06-28 23:02 UTC)