NOISE THAT KILLS
INAUDIBLE TO NAKED EAR MYSTERY OF DEATH. VENICE, October 20. • Yet another engine of death may be launched by scientists in the next war. At the Congress of Radio Biology here Professor R. W. Wood, of Baltimore University, showed how it was possible to be hilled by noise which is inaudible to the naked ear. By means of a cinematograph projector Professor Wood showed a slab of quartz placed in a bowl of oil. The quartz was then subjected to an oscillating current of 280,000 periods a second and 50,000 volts tension. The effect, Professor Wood explained, was to transmit vibrations which were really sounds—but sounds which could not be perceived by the ear. A glass tube was inserted in the oil. The effect was to hum the fingers which held it, but the tube itself was not heated. Whether it is that ultra-sound waves heat the body to such an extent ns to cause death.' or whether death is determined by tli" liberation of the gasses forming.part of the blood is not clear.
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Evening Star, Issue 21878, 15 November 1934, Page 11
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177NOISE THAT KILLS Evening Star, Issue 21878, 15 November 1934, Page 11
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