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Bottling Up Sound Waves

By Guest PostNovember 1, 2014Scienceartificial nanoconstructs, astana process, berkeley lab, deep brain waves, diffraction, guarantor countries, hassan rouhani, john mcafee‏, metamaterials, news conference, ohrdrufer woelfin, old bull, peng zhang, recep tayyip erdogan, reflection, sound waves, tongcang li, xiang zhang, young bull

Acoustic Bottle Beams from Berkeley Lab Hold Promise for Imaging, Cloaking, Levitation and Other Apps

There’s a new wave of sound on the horizon carrying with it a broad scope of tantalizing potential applications, including advanced ultrasonic imaging and therapy, and acoustic cloaking, levitation and particle manipulation. Researchers with the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) have developed a technique for generating acoustic bottles in open air that can bend the paths of sound waves along prescribed convex trajectories. (more…)

Study Portends Greater Anticipated Global Warming

Current state-of-the-art global climate models predict substantial warming in response to increases in greenhouse gases such as carbon dioxide. The models, though, disagree widely in the magnitude of the warming we can expect. The disagreement among models is mainly due to the different representation of clouds. Some models predict that global mean cloud cover will increase in a warmer climate and the increased reflection of solar radiation will limit the predicted global warming. Other models predict reduced cloudiness and magnified warming. (more…)

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Bottling Up Sound Waves

Study Portends Greater Anticipated Global Warming