News tagged with sound waves

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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 ...

Aug 05, 2013
5 / 5 (2) 2 | with audio podcast

Sound waves precisely position nanowires

(Phys.org) —The smaller components become, the more difficult it is to create patterns in an economical and reproducible way, according to an interdisciplinary team of Penn State researchers who, using ...

Jun 19, 2013
5 / 5 (11) 2 | with audio podcast

New maps show how shipping noise spans the globe

The ocean is naturally filled with the sounds of breaking waves, cracking ice, driving rain, and marine animal calls, but more and more, human activity is adding to the noise. Ships' propellers create low-frequency hums that ...

May 31, 2013
5 / 5 (1) 0