England, Kent, Denge, 20ft Experimental Sound Mirror built in 1928, precursor to RADAR, at Greatstone.


Size: 3414px × 5129px
Photo credit: © Bob Battersby / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1920s, 1930s, air, concrete, defence, denge, device, dr, england, english, experimental, greatstone, historic, kent, lakes, listening, mirrors, monument, radar, reserve, rspb, sansome, sound, tucker, uk, william