Interesting mirror at Interesting Times

Sound effects is a 20 August 2010 posting about the Kilnsea sound mirror at Mike Higginbottom’s Interesting Times website.

Among the First World War fortifications that protected eastern England from the German threat is a curious lump of concrete in a field north-west of the Godwin Battery on the coast at Kilnsea on the way to Spurn Point. This enigmatic piece of concrete is an acoustic mirror …

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