File:Noise study microphone in a BART station 1981 or earlier.jpg

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Description
English: Microphones placed in stations measure sounds of arriving and departing trains as part of the assessment program. (Underground BART station pictured)
Date
Source Urban Rail Noise Abatement -Program Digest. Report no. UMTA-MA-06-0099-80-03. Urban Mass Transportation Administration, United States Department of Transportation. Reprint, July 1981.
Author United States Department of Transportation, uncredited photograph
Permission
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Public domain This image is a work of a United States Department of Transportation employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain.

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Other versions Urban Rail Noise Abatement: Program Digest (pdf)

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current20:21, 24 February 2021Thumbnail for version as of 20:21, 24 February 20212,881 × 1,569 (2.58 MB)Ruff tuff cream puff (talk | contribs)Uploaded a work by United States Department of Transportation, uncredited photograph from [https://archive.org/details/urbanrailnoisea0600unse_0/page/8/mode/1up Urban Rail Noise Abatement -Program Digest.] Report no. UMTA-MA-06-0099-80-03. Urban Mass Transportation Administration, United States Department of Transportation. Reprint, July 1981. with UploadWizard

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