File:Acoustic Mirror Kent Great Britain.jpg
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Acoustic_Mirror_Kent_Great_Britain.jpg (640 × 427 pixels, file size: 55 KB, MIME type: image/jpeg)
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Structured data
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Summary
[edit]Camera location | 50° 57′ 18.59″ N, 0° 57′ 29.05″ E | View this and other nearby images on: OpenStreetMap | 50.955165; 0.958069 |
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Object location | 50° 57′ 20″ N, 0° 57′ 12″ E | View this and other nearby images on: OpenStreetMap | 50.955510; 0.953300 |
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DescriptionAcoustic Mirror Kent Great Britain.jpg |
English: The largest of three concrete "sound mirrors" on the coast in Denge, Kent, England, built in the 1930s for air defence. Before radar was developed in World War 2 these were used to detect incoming enemy aircraft by listening for the sound of their engines. This "sound wall" was the largest, a curved wall about 5 m high by 70 m long. The wall focused all the sound coming from a particular direction to a point in front of the wall, the focus; an observer or microphone would be stationed there. The curve of the wall had a circular shape, rather than the parabolic shape used in many sound detectors. The circular shape allowed the sensitivity direction to be swept across the horizon by moving the microphone laterally. The structure is preserved for historical interest. |
Date | Tuesday, 3 October, 2006 |
Source | https://www.geograph.org.uk/photo/456554 |
Author | Mark Duncan |
Permission (Reusing this file) |
Creative Commons Licence |
Licensing
[edit]This image was taken from the Geograph project collection. See this photograph's page on the Geograph website for the photographer's contact details. The copyright on this image is owned by Mark Duncan and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license.
Attribution: Mark Duncan
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 01:20, 7 August 2007 | 640 × 427 (55 KB) | Oxyman (talk | contribs) | {{Information |Description=Acoustic Mirror. |Source=http://www.geograph.org.uk/photo/456554 |Date=Tuesday, 3 October, 2006 |Author=Mark Duncan |Permission=Creative Commons Licence |other_versions= }} == Licensing == {{geograph|456554|Mark Dun |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Camera manufacturer | Canon |
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Camera model | Canon EOS 10D |
Exposure time | 1/180 sec (0.0055555555555556) |
F-number | f/11 |
ISO speed rating | 100 |
Date and time of data generation | 12:33, 3 October 2006 |
Lens focal length | 112 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
File change date and time | 12:33, 3 October 2006 |
Y and C positioning | Centered |
Exif version | 2.21 |
Date and time of digitizing | 12:33, 3 October 2006 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 7.4918518066406 |
APEX aperture | 6.9188690185547 |
APEX exposure bias | 0 |
Maximum land aperture | 4.9708557128906 APEX (f/5.6) |
Metering mode | Pattern |
Flash | Flash did not fire |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 3,443.9461883408 |
Focal plane Y resolution | 3,442.0168067227 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Scene capture type | Standard |
Structured data
Items portrayed in this file
depicts
50°57'18.594"N, 0°57'29.048"E
50°57'19.84"N, 0°57'11.88"E
image/jpeg
72b5836c3a3077fc8fb337ef037ba4cbc00181e2
56,768 byte
427 pixel
640 pixel
Hidden categories:
- Files with coordinates missing SDC location of creation (50° N, 0° E)
- CC-BY-SA-2.0
- Images from Geograph Britain and Ireland
- Images from Geograph Britain and Ireland missing SDC creator
- Images from Geograph Britain and Ireland missing SDC inception
- Images from Geograph Britain and Ireland missing SDC source of file