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The National Technical Information Service acquires, indexes, abstracts, and archives the largest collection of U.S. government-sponsored technical reports in existence. The NTRL offers online, free and open access to these authenticated government technical reports. Technical reports and documents in its repository may be available online for free either from the issuing federal agency, the U.S. Government Publishing Office’s Federal Digital System website, or through search engines.

Details

Acoustics Studies.

PB179353

Publication Date	1968
Page Count	105
Abstract	The report documents the noise and vibration studies for the Bay Area rapid transit District system. Several of the studies involved the investigation of new concepts of noise and vibration control, such as the use of sound barrier walls (often called sound barriers or parapets) along the right-of-way, wheel damping, rail damping, and the use of rail fasteners incorporating vibration-reduction and noise-reduction features. Considerable effort was expended in determining the rank order of the various important sources of noise produced by steel-wheel vehicles passing over steel rails. (Author)
Keywords	Urban planning Railroads Noise Transportation Attenuation Vibration Damping Railroad tracks Fastenings Buildings Concrete Vehicle wheels Steel Acoustics Rapid transit systems Mass transit systems Sound barriers Wheel damping Rail damping Area planning and development
NTIS Subject Category	46A - Acoustics 85H - Road Transportation 50B - Civil Engineering
Corporate Authors	Parsons Brinckerhoff-Tudor-Bechtel, San Francisco, Calif.
Supplemental Notes	Rept. on San Francisco Bay Area Rapid Transit District, Demonstration Project. Sponsored by Department of Housing and Urban Development, Washington, DC.
Document Type	Technical Report
Title Note	Final technical rept.
NTIS Issue Number	196821

Acoustics Studies.

Acoustics Studies.
PB179353

Publication Date	1968
Page Count	105
Abstract	The report documents the noise and vibration studies for the Bay Area rapid transit District system. Several of the studies involved the investigation of new concepts of noise and vibration control, such as the use of sound barrier walls (often called sound barriers or parapets) along the right-of-way, wheel damping, rail damping, and the use of rail fasteners incorporating vibration-reduction and noise-reduction features. Considerable effort was expended in determining the rank order of the various important sources of noise produced by steel-wheel vehicles passing over steel rails. (Author)
Keywords	Urban planning Railroads Noise Transportation Attenuation Vibration Damping Railroad tracks Fastenings Buildings Concrete Vehicle wheels Steel Acoustics Rapid transit systems Mass transit systems Sound barriers Wheel damping Rail damping Area planning and development
NTIS Subject Category	46A - Acoustics 85H - Road Transportation 50B - Civil Engineering
Corporate Authors	Parsons Brinckerhoff-Tudor-Bechtel, San Francisco, Calif.
Supplemental Notes	Rept. on San Francisco Bay Area Rapid Transit District, Demonstration Project. Sponsored by Department of Housing and Urban Development, Washington, DC.
Document Type	Technical Report
Title Note	Final technical rept.
NTIS Issue Number	196821