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111 Comments
- bobsbones, on 06/18/2009, -5/+75Stick one in front of Bill O'Reilly's mouth.
- levitron, on 06/18/2009, -1/+46I love it when things get more less noisy. It makes it harder easier to hear.
- AutoTom, on 06/18/2009, -2/+41"just a little bit more less noisy."
Ah *****, the black hole divbyzero - ethanpeirce, on 06/18/2009, -0/+29They need this on the set of "The View"
- inactive, on 06/18/2009, -2/+29That sounds ***** awesome
- PeaTearGryphon, on 06/18/2009, -2/+28"allowing atoms to flow between the two clouds virtually unimpeded at nearly three millimeters per second. That's more than four times the speed of sound. "
um, 3mm/s = 0.0108 km/h, doesn't seem like four times the speed of sound to me - alpha88, on 06/18/2009, -5/+21Actually I imagine it doesn't sound like much at all.
- BigBadaboom, on 06/18/2009, -0/+14I think that the author just didn't explain it very well. My physics is not good enough to understand much of the paper, but I assume it's to do with the very low density conditions in the gap between the two condensate clouds. Ie. lower density = slower speed of sound.
If you look in the back of the paper (figure 3b), there is a graph showing the average speed of sound below 1 mm/s in the "black hole".
The paper is at: http://arxiv.org/abs/0906.1337 - ZionicIon, on 06/18/2009, -0/+14When did he start talking out of his mouth?
- Tr33fiddy, on 06/18/2009, -0/+12Yeah I balked a little at that too but I'm guessing at that temperature and pressure - the extreme conditions of the experiment, the speed of sound could be that low.
- MortalynFlux, on 06/18/2009, -0/+12I can't believe I got dugg down. People have no compassion here on the Internets.
- kitsua, on 06/18/2009, -0/+10Quick, throw in the Nickleback catalogue!
- Phy6, on 06/18/2009, -0/+10"This is about understanding the basic laws of physics," said Steinhauer. "What this research is good for in day to day life I'm not sure, but we as humans want to understand how the universe works."
At least they're honest and not peddling their research as a potential cure for cancer aids. - christoast, on 06/18/2009, -0/+9WHAT?
- asgardshill, on 06/18/2009, -0/+8I'd rather use it on the rap-listening moron with the 1000W subwoofers in his Honda Civic who comes cruising up and down my street at 2 AM.
- neillawson, on 06/18/2009, -0/+7A little bit more less noisy........ quieter?
- FordSVT1, on 06/18/2009, -0/+7Relative to the speed of sound in it's immediate environment, not the speed of sound in an atmosphere at sea level.
- MortalynFlux, on 06/18/2009, -3/+9Will it cure my tinnitus?
- carbonfilament, on 06/18/2009, -0/+6WHAT?
- inactive, on 06/18/2009, -1/+7STOP SPAMMING DIGG YOU DOUCHEMONKEY!!!!
- nuketrap, on 06/18/2009, -0/+5Yes please do, I would personally give money to them if that could happen
- merdok, on 06/18/2009, -0/+5At least it was classical music at 10:30pm, I had ***** wankers having an RnB party, screaming from their balconies and blasting out ***** hip hop of all thing at 2am!!!
- Phy6, on 06/18/2009, -2/+7right on, that statment made the author seem particularly stupid.
- Paranor01, on 06/18/2009, -0/+5Thing is, the same models they are using with sound waves, could potentially be used for light 'waves' that may bring about a FTL (Faster Than Light) travel method that can actually work, and won't require astronomical amounts of energy to generate.
- inactive, on 06/18/2009, -0/+4Huh? I thought everything was ad-free now.
- Foamator, on 06/18/2009, -0/+4Because RnB is *****?
- zaferk, on 06/18/2009, -1/+5say WHAT again! I dare you!
- disrupter, on 06/18/2009, -0/+4I hope Tails won't get trapped.
- taikyokuken, on 06/18/2009, -0/+4Maybe because he was trying to SLEEP for something like WORK? Not that I don't have a sense of humor or fun, but sometimes it's just inconsiderate.
- carbonfilament, on 06/18/2009, -0/+4I can think of lots of applications for this right off the bat. Of course I work in live entertainment....
-Theater
-Movie Theaters
-Haunted Houses
-Concerts
etc.etc.etc
Just being able to get rid of bad reflections in a poorly designed room would be totally cool.
Now if someone could just invent Light-B-Gone my life would be complete. - edlwannabe, on 06/18/2009, -0/+4Yeah, it's the speed of sound at quantum levels. Really, the speed mentioned in the article equates to be about 35 feet an hour which by normal standards certainly isn't considered Mach 1.
- taikyokuken, on 06/18/2009, -0/+4The Honda driver and RnB partiers must have buried me.
- charlietuna, on 06/18/2009, -0/+3Can I wear these little black holes in my ears on the subway?
- kitsua, on 06/18/2009, -1/+4Digg comment pages - politicising every available non-related topic since 2005!
Talk about irksome whinging..... - lurrker, on 06/18/2009, -0/+3Light-B-Gone is an actual black hole. Probably can't be copyrighted, prior art, etc.
- MortalynFlux, on 06/18/2009, -0/+3Here is the ad-free version:
http://dsc.discovery.com/news/2009/06/17/sonic-bla ... - carbonfilament, on 06/18/2009, -0/+3except lots of movie theaters are no longer thx certified, and they aren't sound proofed enough so there's some transfer from the room next door.
- ducttape36, on 06/18/2009, -0/+3all they need is some atoms cooled to near absolute zero! the perfect crime.
/s - BDutton, on 06/18/2009, -0/+3Yeah... that didn't sound right at first. But it's gotta be because of the temp. Still though... picturing objects CAREENING around at Mach 4, moving a few millimeters per second, is pretty hilarious. They should make tiny fighter jets and see how those are affected.
- MortalynFlux, on 06/18/2009, -0/+2I put that up for the benefit of those who were getting an error message under the digg bar.
- Tr33fiddy, on 06/18/2009, -1/+3So the way I read it is this: very very low temperatures would reduce the capacity for vibrations to be transferred through a material hence the speed of sound reduces with a reduction in temperature.
A BEC (their "cloud") however should technically have either an infinite or at least a much greater speed of sound transfer than the material not at BEC temperatures (which is merely very low but not displaying BEC properties). Hence the gap between the cloud has a low speed of sound with low density where the BEC 'clouds' have high density and high speed of sound.
Edit: Turns out speed of sound does lower with temperature - http://www.sengpielaudio.com/calculator-speedsound ... - Subliminational, on 06/18/2009, -0/+2Speed of sound depends on the density and elastic modulus of the wave propagation medium. The local conditions there are different than air at standard temp and pressure.
- geoboy, on 06/18/2009, -0/+2Sure, once he's finished with that other thing in front of his mouth.
- Cassanova, on 06/18/2009, -0/+2When I read the article the first thing I thought was that someone would use this technology to create noise cancelling headphones in the future
- Jektal, on 06/18/2009, -0/+2Maybe he meant "1/4 the speed of smell"
- bosco84, on 06/18/2009, -0/+2I know sound doesn't work in a vacuum, before anyone says that. I said close to vacuum.
Low density = faster air.
Temperature is also a condition that affects the speed of sound. Heat, like sound, is a form of kinetic energy. Molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly. The speed of sound in room temperature air is 346 meters per second. This is faster than 331 meters per second, which is the speed of sound in air at freezing temperatures.
High school source: http://www.ndt-ed.org/EducationResources/HighSchoo ... - Dpaterso, on 06/18/2009, -0/+2im thinking when this would be very useful for situations like, airplanes taking off / landing... road construction right outside your bedroom window...
seems like it would be pointless for movie theatres as they all already have sound proof walls - CrazedLeper, on 06/18/2009, -1/+3Someone is bound to come up with a way to use it for evil. You could dampen the screams of any number of gunshots and murder victims, simultaneously--for example.
- diggbru, on 06/18/2009, -0/+2"..between the two clouds virtually unimpeded at nearly three millimeters per second. That's more than four times the speed of sound."
Wait, what? - Mihey, on 06/18/2009, -0/+2Key word being "Internets".
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