Word: sonar
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Dates: during 1970-1979
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...microwaves" are very intense concentrations, "short-waves" of electromagnetic radiation focused into an intense beam. They travel through matter, can be reflected by electrical conductors, and can be directed accurately. Thus, microwaves revolutionized communication. They are responsible for television communications, radio (especially FM) broadcasts, CB radio, satellite communication, radar, sonar, and electric garage-door openers...
...waves bounce off objects, then return to the sound chamber in his forehead. He can tell the distance of the object by the strength of the returning sound wave. But these high frequency sound waves penetrate skin as well as water. Dr. John Sutphen, interested in diagnosing illnesses with sonar, conjectures that...
...Biophysicist C. Hellmuth Hertz of the Lund Institute of Technology. Their pioneering accomplishment: the application of ultrasonics to diagnosing abnormalities of the heart. Hailed by the Lasker jurors as perhaps the most important nonsurgical tool for heart diagnosis since the development of the electrocardiograph, the technique uses the familiar sonar echo principle: high-frequency (and inaudible) sound waves reflected from a target reveal its characteristics. Echocardiography can, for example, measure heart-muscle thickness, detect valve abnormalities and even show an image of the heart pumping on a TV screen-all without surgery or other invasive techniques
...first step was to locate the submarine precisely. The Navy dispatched to the waters north of Hawaii its ultrasecret research ship Mizar, a floating electronics laboratory. Like a fishing boat seeking to snare an exotic fish, Mizar put overboard an array of devices: sonar, electronic scanners, cameras equipped with powerful strobe lights, and a magnetic sensor that reacts to the presence of metal on the seabed. For two months Mizar patiently towed its paraphernalia across every inch of the ten-mile-square area until it had detected, scanned and thoroughly photographed the Soviet submarine...
...anatomically structured to emphasize humor, emotional self-control and abstract thought. Much of their brain is also designed to receive an almost unimaginably rich flow of perceptions. Modern technology gives a bare hint of what cetaceans might "think." Most communicate in part with a superior sort of sonar. They emit "clicks" and "pings," then read the echoes in three dimensions. "One dolphin scanning another," explains John Sutphen, a doctor at Connecticut's Lawrence Hospital, "does not just receive an echo from the other's skin but from his interior body as well...