Posts tagged concave

Grand central station NY whispering walls {1}

Whispering Gallery, Grand Central Station

Jan 13th

Posted by Trevor Cox in New York

1 comment

A whispering gallery found in a surprising place, Grand Central Terminal in New York, one of the largest railway stations in the World,

1 Star, yawn2 Stars, OK3 Stars, interesting4 Stars, worth a detour5 Stars, worth a journey
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Sound mirror, Kilsnea, Yorkshire {1}

Sound Mirrors

Dec 29th

Posted by Trevor Cox in England

4 comments

Acoustic mirrors were an attempt to detect enemy aircraft flying towards England in the early twentieth century.

1 Star, yawn2 Stars, OK3 Stars, interesting4 Stars, worth a detour5 Stars, worth a journey
(3 Votes, average 3.33)
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