File:ListeningEarAmplifiers.JPG
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Size of this preview: 409 × 599 pixels. Other resolution: 655 × 960 pixels.
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Summary
Attribution: https://www.thesitemagazine.com/read/perceive-editorial A scaled-down version of parabolic reflectors developed as a personal listening device by the Luchtwachtdienst (Dutch Air Watch Service) for military use in tracking and locating incoming aircraft, 1930–35. Photograph courtesy of Museum Waalsdorp, TNO
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:23, 11 December 2021 | | 655 × 960 (164 KB) | Leeann (talk | contribs) | Attribution: https://www.thesitemagazine.com/read/perceive-editorial A scaled-down version of parabolic reflectors developed as a personal listening device by the Luchtwachtdienst (Dutch Air Watch Service) for military use in tracking and locating incoming aircraft, 1930–35. Photograph courtesy of Museum Waalsdorp, TNO |
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