Denge nr Dungeness  Thanks to Andrew Graham

Spectacular remnants of a dead-end technology, the three concrete “listening ears” at Denge near Dungeness in Kent are the best known of the various early warning acoustic mirrors built along Britain’s coast.

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Dating back to the pre-war period, these colossal sound mirrors were built along the coasts of England and France as an experimental listening ear – a defense mechanism. A lone sound technician would.


Aerial photograph of the sound mirrors at Denge, copyright Ian Ballard

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