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"The giant “acoustic mirrors” that once protected Britain"

If you’re driving through Britain, you might see giant concrete blocks with concave openings. What are they? Acoustic mirrors. More than 100 years ago, these mirrors were built along the coast of England, with the intention of using them to detect the sound of approaching German zeppelins. Invented by William Sansome Tucker, and operated at […]

Read more: https://mathewingram.com/work/index.php/2023/04/18/the-giant-acoustic-mirrors-that-once-protected-britain/