File:330-PS-1897 (USN 708246) (18889817025).jpg
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![File:330-PS-1897 (USN 708246) (18889817025).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/7/7f/330-PS-1897_%28USN_708246%29_%2818889817025%29.jpg/774px-330-PS-1897_%28USN_708246%29_%2818889817025%29.jpg?20180710051005)
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[edit]Description330-PS-1897 (USN 708246) (18889817025).jpg | 330-PS-1897 (USN 708246): Navy Develops “Sound Proofest” Rooms. This old looking structure at Annapolis, Maryland, will house the Naval Acoustic Laboratory in which near perfect sound-proofing has been achieved in three testing rooms. The achievement in sound detection was made possible by the combination of this entirely new idea in sound-proofing and a unique building design. The building is constructed “inside out,” with the interior suspended from outside structural supports. The principal achievement was the creation of an “accordion” form for absorbing sounds. One of the chief elements of the form is fiber glass in sheets eight feet wide and of various lengths. This glass “pillow” was wrapped around a collapsible steel framework which when opened, resembles a spring of v-shaped decorations. The interior of the rooms presents a quilt-line appearance. This decoration has given the Navy what is perhaps the most sensitive sound-free room ever built. The new laboratory has three testing rooms, in any one of which it is possible to record virtually the lowest and highest sound frequencies without interference. The Navy’s civilian engineers worked out the plans for the new testing facility and supervised the construction. It is the property of the Navy’s Bureau of Ships. Photograph released May 25, 1951. (6/16/2015). |
Date | |
Source | 330-PS-1897 (USN 708246) |
Author | National Museum of the U.S. Navy |
Licensing
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This image was originally posted to Flickr by Photograph Curator at https://flickr.com/photos/127906254@N06/18889817025 (archive). It was reviewed on 10 July 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the Public Domain Mark. |
10 July 2018
Public domainPublic domainfalsefalse |
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This file is a work of a sailor or employee of the U.S. Navy, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.
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This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 05:10, 10 July 2018 | ![]() | 3,144 × 2,436 (1.58 MB) | Hiàn (alt) (talk | contribs) | Transferred from Flickr via #flickr2commons |
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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 | NIKON CORPORATION |
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Camera model | NIKON D80 |
Exposure time | 1/400 sec (0.0025) |
F-number | f/10 |
ISO speed rating | 1,600 |
Date and time of data generation | 10:32, 16 June 2015 |
Lens focal length | 24 mm |
Width | 3,872 px |
Height | 2,592 px |
Bits per component |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Software used | Adobe Photoshop CS6 (Windows) |
File change date and time | 06:43, 17 June 2015 |
Y and C positioning | Co-sited |
Exposure Program | Not defined |
Exif version | 2.21 |
Date and time of digitizing | 10:32, 16 June 2015 |
Meaning of each component |
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Image compression mode | 4 |
APEX shutter speed | 8.643856 |
APEX aperture | 6.643856 |
APEX exposure bias | 0 |
Maximum land aperture | 4 APEX (f/4) |
Metering mode | Pattern |
Light source | Unknown |
Flash | Flash did not fire, compulsory flash suppression |
DateTime subseconds | 20 |
DateTimeOriginal subseconds | 20 |
DateTimeDigitized subseconds | 20 |
Supported Flashpix version | 1 |
Color space | sRGB |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Scene type | A directly photographed image |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Focal length in 35 mm film | 36 mm |
Scene capture type | Standard |
Scene control | High gain up |
Contrast | Hard |
Saturation | Normal |
Sharpness | Normal |
Subject distance range | Unknown |
Serial number of camera | 3073408 |
Lens used | 12.0-24.0 mm f/4.0 |
Date metadata was last modified | 02:43, 17 June 2015 |
Unique ID of original document | 9386E6C56634C0438A9842593D9CCFC4 |
IIM version | 44 |