CURIOUS BRITAIN

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GREATSTONE-ON-SEA (Kent) - Listening Device

Information

A collection of three concrete sound mirrors. These were intended for spotting enemy aircraft approaching the shore.  There is a 20ft dish, a 30ft dish and a bowed concrete wall 25ft high 200ft long. They were a fore-runner to radar, built in 1928 to pinpoint enemy aircraft by magnifying the sound of their engines and focusing it at a listening position. There is some doubt as to there effectiveness, but they were never used as they became superseded by radar.

KA05

Location

Inland of the housing at Greatstone-on-Sea is a collection of three sound mirrors. They are on an island which is occasionally open to the public. They can be easily seen from the paths in the area.