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from
Brown Corpus
Sonar in medical research
One of the most gratifying applications of an important technique of submarine detection is in the exploration of the human body.
Our readers are familiar with the principles of sonar where sound waves are sent out in water and the echoes then indicate submerged objects.
Various methods of pulsing, scanning, and displaying these sound waves are used to detect submarines, map ocean floors, and even communicate under water.
In medicine the frequencies are much higher, transducers and the sonar beams themselves are much smaller, and different scanning techniques may be used, but the principles involved are the same as in sonar.
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