Before radar technology existed, military forces turned to mechanical innovation—like this bizarre-looking aco

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Before radar technology existed, military forces turned to mechanical innovation—like this bizarre-looking acoustic locator—to detect incoming aircraft. These “sound mirrors” or “listening devices” were designed to amplify distant engine noises and give early warning of approaching bombers, especially during World War I and the interwar period.

Often worn or mounted like oversized headphones, they worked best in quiet environments and could pick up aircraft from miles away. While eventually rendered obsolete by radar, these devices represent a fascinating chapter in the evolution of early warning systems—a time when engineers relied solely on physics and acoustics to protect the skies.

,PreRadarTechnology ,MilitaryEngineering ,SoundLocators ,WartimeInnovation ,AcousticDefense

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