How WWI soldiers used barrels of oil to pinpoint enemy artillery fire
In short: On the Western Front, locating hidden enemy guns was a matter of survival. Without modern recording tech, soldiers turned to sound ranging: a clever technique using buried oil barrels as microphones. By analyzing the time delay between blasts, they could triangulate enemy positions and silence the guns for good.
During the First World War, the battlefield soundscape was defined by relentless artillery, yet recording this chaos was nearly impossible. Magnetic tape did not exist, and mechanical recording devices were too fragile for the front. To overcome this, specialized units developed sound ranging, a method that functioned similarly to a seismometer. Technicians buried barrels of oil in the ground to act as microphones, spaced at specific intervals to capture the vibrations of incoming and outgoing fire.
These microphones were connected to photographic film, which recorded the intensity of the noise as visual waves. By measuring the precise time difference between when a shot was fired and when it registered across the array of six microphones, soldiers could triangulate the exact location of enemy artillery. This data allowed commanders to adjust their own guns with lethal accuracy. The technique was so effective that it captured the final, chaotic minutes of the war.
A rare piece of this sound ranging film, preserved in the Imperial War Museum’s collection, records activity near the River Moselle on the American front. It captures the intense barrage occurring at 10:58 A.M. on November 11, 1918, followed by the sudden silence when the Armistice took effect at 11:00 A.M. This document provides a rare, objective look at the intensity of the conflict, which claimed the lives of over 9.5 million military personnel and an equal number of civilians.
To commemorate the 100th anniversary of the war's end, the museum commissioned Coda to Coda to interpret this film. By researching the specific weapons used and the landscape's reverberation, they recreated the sound of that final minute. Through a specialized soundbar that conducts audio through the visitor's arms to their skull, the exhibit allows modern audiences to both hear and physically feel the moment the guns finally fell silent.
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Sources
- Summary by Intellect · source: Sound Ranging and the End of The War
- Also: Listen to the Moment the Guns Fell Silent, Ending World War I
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