The ability on the part of researchers to manipulate sound waves has led to the development of critical technologies, for example, enabling ultrasonic transducers to image the interior of the human body (aka “ultrasound”). A team of researchers at the California Institute of Technology in Pasadena think they’ve found a way to make sound waves even more powerful with the help of a new type of acoustic lens. Caltech researchers Alessandro Spadoni and Chiara Daraio describe how they create “sound bullets” in a study published in the April 5 issue Proceedings of National Academy of Sciences . [More]
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