WW1AcousticMirrorKilnsea(PaulGlazzard)Jan2007

(c) Paul Glazzard, CC BY-SA 2.0

Autor:

Paul Glazzard

Shortlink:

https://czwiki.cz/b/b6842

Zdroj:

Wikimedia Commons

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640 x 480 Pixel (52687 Bytes)

Popis:

WW1 Acoustic Mirror, Kilnsea, East Riding of Yorkshire, England.

Rare 4.5 metre high concrete structure near Kilnsea Grange, northwest of Godwin Battery, a relic of the First World War. On the pipe in front of the acoustic mirror was a trumpet-shaped ‘collector head’, a microphone which could pick up the reflected engine sound of Zeppelins approaching from the sea. Wires passed down the pipe to a listener seated in a trench nearby with a stethoscope headset, who would try to determine the distance and bearing of any enemy airships.

Komentář k Licence:

Creative Commons Attribution Share-alike license 2.0

Licence:

CC BY-SA 2.0

Credit:

From geograph.org.uk

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