News tagged with acoustic

Military sonar can alter blue whale behavior

Some blue whales off the coast of California change their behavior when exposed to the sort of underwater sounds used during U.S. military exercises. The whales may alter diving behavior or temporarily avoid important feeding ...

dateJul 03, 2013 in Plants & Animals
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Plants 'talk' to plants to help them grow

Having a neighborly chat improves seed germination, finds research in BioMed Central's open access journal BMC Ecology. Even when other known means of communication, such as contact, chemical and light-mediated signals, are ...

dateMay 06, 2013 in Ecology
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A layer of tiny grains can slow sound waves

In some ways, granular material—such as a pile of sand—can behave much like a crystal, with its close-packed grains mimicking the precise, orderly arrangement of crystalline atoms. Now researchers at MIT have pushed that ...

dateAug 05, 2013 in General Physics
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Using sound to picture the world in a new way

Have you ever thought about using acoustics to collect data? The EAR-IT project has explored this possibility with various pioneering applications that impact on our daily lives. Monitoring traffic density in cities and assisting ...

dateOct 22, 2014 in Engineering
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3D modeling of the Sun from the core to the surface

A team at the Astrophysics, Instrumentation and Modeling Laboratory (CEA/CNRS/Université Paris Diderot) has successfully modeled, in 3D, the effects of gravity waves in an extremely comprehensive simulation of the Sun, from ...

dateMay 14, 2014 in Astronomy
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Beneath the Arctic polar cap

( —The Arctic polar cap has been melting at an astonishing rate over the past 20 or so years. In addition to causing higher sea levels and other environmental impacts, the decreasing surface is opening up new resources ...

dateJun 12, 2014 in Earth Sciences
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Making frequency-hopping radios practical

The way in which radio spectrum is currently allocated to different wireless technologies can lead to gross inefficiencies. In some regions, for instance, the frequencies used by cellphones can be desperately congested, while ...

dateMay 15, 2013 in Semiconductors
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