War Tubas War Tubas

We bring you the strange history of listening before radar by Chris Wild.

During World War I, aerial warfare became increasingly important. Zeppelin airships conducted bombing raids on the south coast of England, and winged aircraft were employed as bombers by both sides. If their approach was detected, fighter aircraft could head off the enemy or shoot them down.

War tubas 1930's  War Tubas Radar 3 copy

Aircraft engines produced unprecedented sound, so in order to hear them at a distance, the war efforts developed listening devices. Some were small and portable, for the use of one person. The operator listened using stethoscope-style headphones.

War tubas 1930's  War Tubas Radar 4 copy

But detecting engine noises at greater distances allowed more time to prepare a response. Large and elaborate detectors were experimental, and their efficiency varied widely. A number of designs were quite striking, such as the Japanese acoustic locators nicknamed “war tubas.”

Delightfull Catalogue  War Tubas hhhh

War tubas 1930  War Tubas Radar 5 copy War tubas 1925  War Tubas Radar 6 copy

Their use continued until the early years of WWII, but increases in aircraft speeds and the development of radar rendered them obsolete.

War tubas 1921  War Tubas Radar 7 copy War tubas 1930's  War Tubas Radar 8 copy War tubas 1932  War Tubas Radar1 copy

Re-post via mashable.

See also: Miniature W-32 Engine