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Parabolic sound mirrors, Dungeness, Kent
England
Built as an early warning device for aircraft the three concrete “listening ears” at Denge on Dungeness are the best examples of this technology and are Grade 1 listed as Ancient Monuments. They were effective, but the development of faster aircraft made them redundant, as an aircraft would be within sight by the time it had been located.
Copyright: Bruce Hemming
Type: Spherical
Resolution: 14796x7398
Taken: 19/07/2015
上传: 05/06/2020
观看次数:

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Tags: dungeness; denge; sound mirrors; ancient monuments; history; technology; landscape; early warning
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