Word: detector
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Dates: during 1930-1939
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...listener to hear it louder in one ear than in the other. He rotates the bar until the sound volume is equal in both ears; then the bar is perpendicular to the direction of the sound source. In antisubmarine practice, it was soon found impracticable to rotate the detector, whether attached to the hull of the patrol ship or towed behind. So the detector was kept stationary and the effect of rotation was obtained by lengthening the path from one receiver to one ear, shortening the other, until the sound volume was equal in both ears. This was called "binaural...
...parent and educator suspects that children's radio programs overexcite their youthful audiences. Parent John James DeBoer, whose one child is too young to listen to radio, investigated the suspicion. He questioned 738 grammar-school children, had 486 radio-listening moppets watched, used a "photopolygraph" (modified lie detector) on 148 to measure respiration, blood pressure, pulse, electrical resistance of skin...
Died. Rev. Walter Gerard Summers, S. J., 49, head of Fordham University's department of psychology; of coronary thrombosis; in The Bronx. Father Summers invented a lie detector (psychogal-vanometer), which registers the variation in the minute electrical currents coursing through the body, claimed 100% accuracy for it. Last March, in Queens County Court, N. Y., his lie detector was the first to be accepted as a creditable witness in a New York criminal court...
...detector...
...Earl were picked up in Oakland, Calif, in Bassett's car. The fragmentary corpse was never found though much excavation was done about Mrs. Smith's premises. The trial of Mrs. Smith was the first in the U. S. in which the prosecution used the lie-detector and "truth serum." Mrs. Smith and Earl, who were rather simple people, were so terrified by science that they confessed enthusiastically to everything. But the public indignantly protested the newfangled lie-detector. The defense got an injunction, mother and son were finally sentenced only for stealing Bassett's car, which...