Show Potency of Deadly Sound IV Waves aves Shown A noise death instead of a death ray lay was was the phenomenon discussed recently before the National Academy of Science by Prof II R. A. A Wood and Alfred I L. L LoomIs of the Johns h HopkIns Hopkins Hop Hop- op- op kins university The noise death would have been inaudible to fo human ears but it consisted of ot sound waves Just the same and it killed small fishes and other aquatic animals in vessels of water in less than n n. amin min min- ute The two researchers generated exceedingly high frequency sound 11 waves by by means of electrical ra- ra The waves were produced at ii a rate of from to to the second The upper upper limit of audibility to human ears is between and If a beam of these sound waves is directed toward the surface of the thc water Professor Wood said the surface is heaped up in a mound The vibrations heat the water a rise of nearly 10 degrees Fahrenheit In one minute having been recorded 1 |