Acoustics: Making 3-D Pictures with Sound

Before long, the operations officer on a U.S. Navy ship may be able to tune in a device that can reproduce a three-dimensional image of an enemy submarine scores of fathoms below the surface. Or a brain surgeon may have at his fingertips the means to see, in 3D, a deep, tiny tumor that even modern X-ray techniques could not detect. Such far-out capabilities are now within reach thanks to Scientists Alexander Metherell, John Dreher, Lewis Laramore and Hussein El-Sum, of the McDonnell Douglas Corp.'s Advanced Research Laboratories at Huntington Beach, Calif....

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