Word: sonics
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...months last year, supersonic aircraft swept over Oklahoma City, subjecting its inhabitants to eight sonic booms a day. It was part of an elaborate test conducted by the Federal Aviation Agency to discover just how much annoyance and damage the booms will cause groundlings, if and when a projected supersonic transport (SST) is ever built and put into full service by the nation's airlines...
...Pratt & Whitney). The airframe makers have discovered that a relatively small reduction in airframe weight produces a disproportionately larger increase in payload; a 1% reduction, for example, would increase the payload by 10%. National Aeronautics and Space Administration research has given increased hope for solving the problems of sonic boom. And estimates of the world market for the SST have been raised from 200 planes...
Bats hunt night-flying moths by echolocation, uttering rapid chirps of ultra sonic sound and flying toward echoes that bounce back from their prey. It is a simple and effective system, but Dr. Roeder proved several years ago that noctuid moths can hear the search sonar of a cruising bat and take evasive action. To save their lives, they fold their wings and dive to the ground or shift suddenly into a zigzag course (TIME, June...
...with Dr. Dunning's help, Roeder has discovered much more advanced moths that send out their own sonic signals; they can make clicking sounds that are not very different from the search-sonar pulses of bats...
...their manufactured desert town through 15 sonic booms over a three-hour stretch. So well did the buildings bear the booms that a disappointed CBS camera crew left before the show was over. Then, for that inevitable one last picture, a Starfighter was ordered to make a low-level pass at subsonic speeds. But the pilot miscalculated, the speed indicator climbed, and the results were spectacularly embarrassing. Just as FAA Deputy Administrator Gordon Bain was answering a reporter's question about the psychological reaction to sonic booms, a walloping blast shook the walls, Bain and the newsmen...