File:Acousticlocatorusarmy1935.jpg
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Acousticlocatorusarmy1935.jpg (320 × 264 pixels, file size: 23 KB, MIME type: image/jpeg)
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English: US Army Signal Corps aircraft sound locator equipment, 1935. Before radar was developed in World War 2, acoustic horns like this were used in air defence to detect incoming enemy aircraft at a distance by the sound of their engines. Stereo horns, one attached to each ear, allowed the observer to judge the direction of the aircraft. First Army Maneuvers, Pine Camp, New York, August 1935. Signal Corps Photo 103030. |
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| Source | Transferred from en.wikipedia to Commons by Evers. URL: http://www.infoage.org/Dav-1-fig15.html |
| Author | Unknown author |
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
Note: This only applies to original works of the Federal Government and not to the work of any individual U.S. state, territory, commonwealth, county, municipality, or any other subdivision. This template also does not apply to postage stamp designs published by the United States Postal Service since 1978. (See § 313.6(C)(1) of Compendium of U.S. Copyright Office Practices). It also does not apply to certain US coins; see The US Mint Terms of Use.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
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The original description page was here. All following user names refer to en.wikipedia.
- 2006-04-11 17:37 Nagle 320×264×8 (23644 bytes) 1935-MODEL SOUND LOCATOR First Army Maneuvers, Pine Camp, New York, August 1935. Signal Corps Photo 103030 URL: http://www.infoage.org/Dav-1-fig15.html
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 11:31, 16 February 2008 | | 320 × 264 (23 KB) | File Upload Bot (Magnus Manske) (talk | contribs) | {{BotMoveToCommons|en.wikipedia}} {{Information |Description={{en|1935-MODEL SOUND LOCATOR First Army Maneuvers, Pine Camp, New York, August 1935. Signal Corps Photo 103030 URL: http://www.infoage.org/Dav-1-fig15.html}} |Source=Transferred from [http://e |
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