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File:RIAN archive 38689 Defending the Moscow sky.jpg

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  • English: “Defending the Moscow sky”. Soviet soldiers manning an acoustic aircraft detector near Moscow, in 1941 during World War 2, to detect German bombers. Before radar was developed in World War 2, air defense forces used acoustic horn sound detectors like this one to listen for the sound of approaching enemy planes. The sound collected by the horns was conducted by rubber tubes to "stethoscope-like" earphones on the technician at left. Separate horns connected to each ear allowed the technician to judge the direction of the aircraft by stereophonic hearing. The 4 horns were used in pairs; the horizontal pair to determine direction and the vertical pair to determine elevation.
  • Русский: «На страже московского неба». Солдаты противовоздушной обороны обслуживают звукоулавливающую установку Россия
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RIA Novosti archive, image #38689, http://visualrian.ru/ru/site/gallery/#38689

6x8 film / 6х8 негатив
Author
Naum Samojlovich Granovskij  (1910–1984)  wikidata:Q4147959
 
Alternative names
English: Naum Granovskij
Русский: Наум Грановский
Description Russian-Soviet journalist, photographer and visual artist
Date of birth/death 27 February 1910 / 1910 Edit this at Wikidata 20 August 1984 Edit this at Wikidata
Location of birth Oleksandriia
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creator QS:P170,Q4147959
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(Reusing this file)		 Commons:RIA Novosti

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w:en:Creative Commons
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This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
Attribution: RIA Novosti archive, image #38689 / Vladimir Granovskiy / CC-BY-SA 3.0
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current10:37, 30 September 2011Thumbnail for version as of 10:37, 30 September 2011824 × 1,024 (288 KB)RIANbot (talk | contribs)== {{int:filedesc}} == {{Information |Description= * {{en|'''“Defending the Moscow sky”.''' Air defense soldiers service the sound detector.}} * {{ru|'''«На страже московского неба».''' Солдаты противовозду�

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