News tagged with sound
Newly developed cloak hides underwater objects from sonar
In one University of Illinois lab, invisibility is a matter of now you hear it, now you don't.
Jan 05, 2011 |
4.8 / 5 (30) |
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Quantum leap for phonon lasers
Physicists have taken major step forward in the development of practical phonon lasers, which emit sound in much the same way that optical lasers emit light. The development should lead to new, high-resolution ...
Feb 22, 2010 |
4.6 / 5 (30) |
13
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Scientists drag light by slowing it to speed of sound
(PhysOrg.com) -- Scientists at the University of Glasgow have, for the first time, been able to drag light by slowing it down to the speed of sound and sending it through a rotating crystal.
Jul 06, 2011 |
4.7 / 5 (27) |
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A sonic boom in the world of lasers
It was an idea born out of curiosity in the physics lab, but now a new type of ‘laser’ for generating ultra-high frequency sound waves instead of light has taken a major step towards becoming a unique and highly useful 21st ...
Jun 17, 2009 |
4.8 / 5 (23) |
6
Electron's negativity cut in half by supercomputer
(PhysOrg.com) -- While physicists at the Large Hadron Collider smash together thousands of protons and other particles to see what matter is made of, they're never going to hurl electrons at each other. No ...
Jan 12, 2012 |
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Plasmonic Promises: First Observation of Plasmarons in Graphene
(PhysOrg.com) -- The energy bands of complex particles known as plasmarons have been seen for the first time by scientists working with graphene at the Advanced Light Source. Their discovery may hasten the ...
May 20, 2010 |
4.9 / 5 (21) |
6
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New radio chip mimics human ear, could enable universal radio (w/Video)
(PhysOrg.com) -- MIT engineers have built a fast, ultra-broadband, low-power radio chip, modeled on the human inner ear, that could enable wireless devices capable of receiving cell phone, Internet, radio ...
Jun 03, 2009 |
4.2 / 5 (24) |
2
DARPA releases video of HTV-2 hypersonic glider flight
An unmanned glider streaks over the Pacific Ocean at 20 times the speed of sound in a video released Thursday by a U.S. defense research agency experimenting with technology that could give the military the ...
Aug 25, 2011 |
4 / 5 (24) |
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Coke cans focus sound waves beyond the diffraction limit
(PhysOrg.com) -- When trying to focus sound waves into as small an area as possible, scientists run into a fundamental limit called the diffraction limit. That is, when sound waves are focused into a region ...
Jul 12, 2011 |
4.7 / 5 (20) |
27
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First hyperlens for sound waves created
Ultrasound and underwater sonar devices could "see" a big improvement thanks to development of the world's first acoustic hyperlens. Created by researchers with the U.S. Department of Energy's Lawrence Berkeley ...
Oct 25, 2009 |
4.6 / 5 (19) |
4
Pentagon successfully tests hypersonic flying bomb
The Pentagon on Thursday held a successful test flight of a flying bomb that travels faster than the speed of sound and will give military planners the ability to strike targets anywhere in the world in less than a hour.
Nov 17, 2011 |
4.1 / 5 (21) |
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Scientists first to trap light and sound vibrations together in nanocrystal
(PhysOrg.com) -- Researchers at the California Institute of Technology have created a nanoscale crystal device that, for the first time, allows scientists to confine both light and sound vibrations in the ...
Oct 26, 2009 |
4.5 / 5 (19) |
9
Sound bullets could treat cancers and replace ultrasound (w/ Video)
(PhysOrg.com) -- Acoustic devices are used in a range of applications such as ultrasound scanners, but their performance is limited for some uses by their inaccurate focusing and low focal power. Now a group ...
Apr 07, 2010 |
4.9 / 5 (16) |
1
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When dark energy turned on (Update)
(PhysOrg.com) -- Some six billion light years distant, almost halfway from now back to the big bang, the universe was undergoing an elemental change. Held back until then by the mutual gravitational attraction ...
Mar 30, 2012 |
4 / 5 (19) |
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Tiny Music Player Made from Wire Bridge (w/ Video)
(PhysOrg.com) -- In 2008, scientists built a loudspeaker made of carbon nanotubes that produced sound and music based on the thermoacoustic effect. Now, a different team of scientists has built a loudspeaker ...
Nov 04, 2009 |
4.2 / 5 (18) |
1
Sound
Sound is a travelling wave which is an oscillation of pressure transmitted through a solid, liquid, or gas, composed of frequencies within the range of hearing and of a level sufficiently strong to be heard, or the sensation stimulated in organs of hearing by such vibrations.
For more information about Sound, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
