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Architecture & Design Technology

Dual head-mounted listening devices

This dual-mounted listening device served as an aircraft detection device before the invention of radar in 1935.

The Dutch military used the elephant-looking ears to detect approaching enemy aircraft by listening afar for engine sounds.

There were various iterations of the acoustic locators.

The Germans created a dual sight and sound system in 1917 that combined sound-ranging capabilities with binoculars to scope out aircraft.

Dual head-mounted listening devices

The Imperial Japanese army used massive war tubas (resembling the musical tuba instrument) in World War I to detect the sound of incoming aircraft.

Dual head-mounted listening devices

The Dutch also created personal horns in 1935 that were double the size of the personal sound locator.

Dual head-mounted listening devices

England built concrete acoustic mirrors around its coasts up until 1935.

Dual head-mounted listening devices

Learn more about pre-radar objects here.

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By Wells Baum

Wells Baum is a daily blogger and curious explorer of the world who connects the dots between life, arts, and knowledge.