Science: Deadly Noise

Little sound waves are deadlier than big ones. Last week the U.S. Army Signal Corps described (with dark reticence) some experiments at State College, Pa. on sound waves too short (high-pitched) for the human ear to hear. The inaudible racket killed mice in one minute. The insidious little waves also killed cockroaches and mosquitoes.

The Signal Corps did not describe the gadget used to generate the waves. Neither did it tell the military objective of the experiments. The Germans tried with no success to use sound as a military weapon in World War II, but their devices were comparatively crude. The...

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