News tagged with sound absorption
Oceans becoming noisier thanks to pollution -- report
The world's oceans are becoming noisier thanks to pollution, with potentially harmful effects for whales, dolphins and other marine life, US scientists said in a study published Sunday.
Dec 20, 2009 |
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Search results for sound absorption
Screening for breast cancer without X-rays: Lasers and sound merge in promising diagnostic technique
X-ray mammography is an important diagnostic tool in the fight against breast cancer, but it has certain drawbacks that limit its effectiveness. For example, it can give in false positive and negative results; ...
May 07, 2012 |
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Lenses can bend light and sound in almost any direction
(PhysOrg.com) -- When an optical fiber is bent by 90° or more, the light begins to leak away, posing a problem for fiber optics communications. But by using special lenses that can bend light by not only ...
Apr 02, 2012 |
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New design for a metamaterial could be far more efficient at capturing sunlight than existing solar cells
Metamaterials are a new class of artificial substances with properties unlike anything found in the natural world. Some have been designed to act as invisibility cloaks; others as superlenses, antenna systems ...
Mar 09, 2012 |
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Nanoshell whispering galleries improve thin solar panels
Visitors to Statuary Hall in the U.S. Capitol Building may have experienced a curious acoustic feature that allows a person to whisper softly at one side of the cavernous, half-domed room and for another on ...
Nanotechnology / Nanomaterials
Feb 07, 2012 |
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Methane debate splits Mars community
Observations over the last decade suggest that methane clouds form briefly over Mars during the summer months. The discovery has left many scientists scratching their heads, since it doesn't fit into models ...
Space & Earth / Space Exploration
Sep 13, 2011 |
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Tunable graphene device demonstrated: First tool in kit for putting terahertz light to work
Long-wavelength terahertz light is invisible – it's at the farthest end of the far infrared – but it's useful for everything from detecting explosives at the airport to designing drugs to diagnosing ...
Nanotechnology / Nanomaterials
Sep 04, 2011 |
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Nanoplasmonic 'whispering gallery' breaks emission time record in semiconductors
Renaissance architects demonstrated their understanding of geometry and physics when they built whispering galleries into their cathedrals. These circular chambers were designed to amplify and direct sound ...
Nanotechnology / Nanomaterials
Jul 22, 2011 |
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Non-independent mutations present new path to evolutionary success
Mutations of DNA that lead to one base being replaced by another don't have to happen as single, independent events in humans and other eukaryotes, a group of Indiana University Bloomington biologists has learned after surveying ...
Jun 02, 2011 |
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Curtains that 'quench' noise
Swiss researchers at Empa, in cooperation with textile designer Annette Douglas and silk weavers Weisbrod-Zürrer AG, have developed lightweight, translucent curtain materials, which are excellent at absorbing ...
May 03, 2011 |
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Risks from radiation low in Japan but panic high
(AP) -- Risks from possible radiation exposure remain greatest for the workers scrambling to cool reactors at a Japanese nuclear power plant. Those who have been evacuated from the site are considered safe, ...
Mar 17, 2011 |
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List of search results for sound absorption
