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发帖数: 29576 | 1 American troops using a newly-developed acoustic locator, mounted on a
wheeled platform. The large horns amplified distant sounds, monitored
through headphones worn by a crew member, who could direct the platform to
move and pinpoint distant enemy aircraft. Development of passive acoustic
location accelerated during World War I, later surpassed by the development
of radar in the 1940s. |
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