A sound/acoustic mirror is a structural instrument used to reflect and focus sound. Formally a Royal Airforce site, Denge is the location where numerous experimental listening apparatuses were built during WWI. The image to the right features a 30ft concrete dish that still retains the microphone pole at it's center. An individual would be located in a chamber below ground listening for any possible attacks.
“The history of the sound mirrors is a story of research, trial and error that left a legacy of enigmatic, monolithic ruins, suggestive of previous civilizations and strange practices. The original acoustic mirrors listened to the sky in apprehension of an invasion; our continuing fascination comes from their very human atmosphere of longing and solitude. The mirrors seem to be yearning for contact, an image that is echoed in today’s radio telescopes, listening for extra terrestrial voices.”