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Acoustic Superlens Built From Soda Cans
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."
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?
Meh. Real men drink beer in bottle.
Oh, can it, you.
The more you know, the more you have to say and the more you should listen.
This is the perfect solution to getting the neighbor to turn down their stereo
Or really big cans, aka kegs.
make imaginary.friends COUNT=100 VISIBLE=false
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.
Something witty.
Beer doesn't come in cans.
If the masses can keep you down, you're not the Ubermensch.
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
I only mention this because I would think with a scientific experiment like this, speaker volume consistency would be VERY important...
I hear Michael Jackson came in little white cans.
You are welcome on my lawn.
FTFA: "The team managed this through time reversal...."
Beer doesn't come in cans.
Milk does?
I think this poster made a reference to the bug with the "singing penis". Don't quote me on that though.
The more you know, the more you have to say and the more you should listen.
Here's another tip:
Google 'Stereo balance control'
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.
I only post comments when someone on the internet is wrong.
Pah... Real men would use beer cans!
But then it wouldn't be the sound of diabetes coming to get you!
These posts express my own personal views, not those of my employer
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.
yea dude builds drum out of cans, uses it to focus only specialized frequency's to a fine point in front, no one really cares, out side of the "look what this dude did" factor
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
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.
Milk comes in jugs or bags. Or jugs that eventually become bags.
Pain is merely failure leaving the body
Until someone accidentally says "Muad-dib!" through the array and something explodes.
Mind the frickin' laser...
It means they can focus sound energy into a small spot, much smaller than without the superlens array. They can also control the location of the spot, or even have more than one focus spot at the same time. It wouldn't be practical for music because of the limited frequency range, but there are applications where they can use sound energy to push small objects around. If they can scale it down to microscopic size using ultrasonic frequencies, it might be useful to manipulate cells or large biological molecules.
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.
No, beer casks are definitely of a different variety from whiskey casks. If you're using the same for both, you're doing something wrong!
Two things are infinite: the universe and human stupidity, though I'm not yet sure about the universe. - A Einstein
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?
Time to offend someone
Beer doesn't come in cans.
They come in pints?!