photograph featuring two Japanese acoustic locators mounted on 4-wheel carriages, taken in the 1930s
The 'Japanese war tuba' is a
colloquial name sometimes applied to
Imperial Japanese Army acoustic locators due to their visual resemblance to the musical
tuba. The name derived from a misidentification, probably in jest, of a historical photo from the 1930s featuring the Japanese emperor
Hirohito inspecting the acoustic locators with anti-aircraft guns in the background.
Acoustic location
Acoustic location was used from mid-
World War I to the early years of
World War II for the passive detection of
aircraft by picking up the noise of the
engines. It was rendered obsolete before and during World War II by the introduction of
radar, which was far more effective.
Many examples of
acoustic location mirrors can still be found on the seacoast of Britain to this day.
External links
★
Acoustic Location and Sound Mirrors
★
Higher resolution image
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