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Science

Acoustic Superlens Built From Soda Cans 59

Posted by timothy
from the sir-these-expense-reports-are-alarming dept.
Freddybear writes "Researchers in France have assembled an acoustic superlens from an array of soda cans. The cans act as resonators, and by exciting the array with tailored sound waves, the sound volume can be made to peak in specific volumes less than a few centimeters wide."
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Acoustic Superlens Built From Soda Cans

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  • Science? (Score:5, Funny)

    by Anonymous Coward on Thursday July 14, 2011 @03:30PM (#36767880)

    Why can't we have more articles about comic book movies, video games, political partisanship and trading music in the name of human rights instead of this garbage?

  • Pah... Real men would use beer cans!

  • by Anonymous Coward

    This is the perfect solution to getting the neighbor to turn down their stereo

    • by Jeng (926980)

      From what I gathered from the topic this would be the perfect solution for your neighbor to listen to his music full blast while the sound only takes place within a small area and wouldn't be able to be heard outside of that small area.

      Hell, if you were attempting to use this against your neighbor it would just make his music louder, probably making him happier.

  • Given the idea of directing sound waves, if this could be done with an inaudible frequency, for imaging, would sound waves be able to penetrate clothing?

    This is coming from someone who is not modest, so the scope part of the scope&grope doesn't bother me.
    Radiation, however, is one of my many, only weaknesses.

    • by wagnerrp (1305589)
      Are you referring to back-scatter X-Ray imagery, or are you one of "those" types who think they are sensitive to THz waves?
      • The backscatter... but now that you mention it...
        My wireless frequencies impact me negatively, when they aren't working correctly that is.

        Honestly though, could it be used similarly to a sonogram, as mentioned a few days ago, with this tech?
        I am no acoustics or physics major, so its an honest question.

    • by Idbar (1034346)
      Is this technology [google.com] what you're referring to?
  • Here's a tip: those speakers suck. I just tossed a pair because the left speaker was about half as loud as the right speaker. Don't believe me? http://www.google.com/search?q=logitech+speaker+left+not+working [google.com]

    I only mention this because I would think with a scientific experiment like this, speaker volume consistency would be VERY important...

    • by nospam007 (722110) *

      Here's another tip:
      Google 'Stereo balance control'

      • by havardi (122062)

        Hah, I actually did that. Maybe it was less than 50%-- the volume was so low it was really lame to equalize both to the lowest denominator. Not to mention when I'd plug in my headphones I'd have to go reset the balance because the physical defect didn't affect the headphone jack on the speaker.

    • by Osgeld (1900440)

      all consumer grade speakers suck, they never use big enough drivers and never enough air volume so you end up with tin cans and a floppy sub that instadistorts whenever a female voice comes though for the ultimate in ass

      buy a decent monitor set, or if that is out of your budget at least get some beefy drivers and do a little bit of math to make a correct size enclosure

  • FTFA: "The team managed this through time reversal...."

  • Please allow my duplex neighbor to be an early prototype tester. That sonofabitch has a big-screen TV (in his bedroom!) with a very bass-heavy sound system, and he just can't sleep without it on.

  • by Anonymous Coward

    Our research was sound, our results undeniable. We would propel the world with our acoustical actuators. Every day brought new discoveries ... until today.

    As the echoes of a blaringly successful session faded, Geoffroy shouted, "Alright, Lemoult!"

    Our apparatus rang, then exploded. The devastation ... The horror ...

    Today I learned my name is a killing word.

  • I wonder what the range would be if you used very low-frequency, specially-built resonators and a few megawatts of power. Maybe you could throw it out about a wavelength and burst organs through body armor at 50 yards.
  • Can they make a car version that has the sound peak in the area of the drivers head so I don't have to listen to the crap from the hoopties on the highway in rush hour. If they can't then can we ban old Chevrolet Caprices on 22 inch chrome spinner rims?

To avoid criticism, do nothing, say nothing, be nothing. -- Elbert Hubbard

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