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Acoustic locators (7 photos)
Acoustic location is used to determine the location and direction of movement of bodies. At the beginning of the XX century was skonstroirovan number of unusual gadgets for the empowerment of the human ear, some of which can be viewed under the cut.
Made by the Czechs in 1920, the
Such a device was used by the Dutch military.
But this US owned.
Made by the Czechs in 1920, the
Such a device was used by the Dutch military.
But this US owned.
