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 detector devised direction early faintest great incoming japan listening locator means mircrophones observer provide resembling sounds them tuba tubes turned used vaguely war warning wars was which world ww1

Aeroplane Detector Devised During The Great War Editorial Photo


Aeroplane detector devised during the Great War Editorial Stock Photo
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Aeroplane detector devised during the Great War #266898467
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Air Defences - Aeroplane detector devised during the Great War / WW1. It caught the faintest sounds from the direction in which it was turned, and by means of mircrophones carried them through listening tubes to the observer. An acoustic locator, vaguely resembling a tuba, used by Japan during the World Wars to provide early warning of incoming aircraft.

This image is editorial