Noise Control for Rapid Transit Cars on Elevated Structures: Preliminary Investigation of Vehicle Skirts, Undercar Absorption, and Noise Barriers

Schafer, M; Towers, D; Eldred, K; Hanson, C. E.; Bolt, Beranek, and Newman, inc.; John A. Volpe National Transportation Systems Center (U.S.); United States. Urban Mass Transportation Administration

doi:10.21949/1526607

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Noise Control for Rapid Transit Cars on Elevated Structures: Preliminary Investigation of Vehicle Skirts, Undercar Absorption, and Noise Barriers

1980-04-01
By Schafer, M ; Towers, D ; Eldred, K ; ...

[PDF-2.79 MB]

English

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Creators:

Schafer, M ; Towers, D ; Eldred, K ; Hanson, C. E.

Schafer, M ; Towers, D ; Eldred, K ; Hanson, C. E. Less -
Corporate Creators:

Bolt, Beranek, and Newman, inc. ; John A. Volpe National Transportation Systems Center (U.S.) ; United States. Urban Mass Transportation Administration

Bolt, Beranek, and Newman, inc. ; John A. Volpe National Transportation Systems Center (U.S.) ; United States. Urban Mass Transportation Administration Less -
Subject/TRT Terms:

[+]

Acoustic Absorption Acoustic Measurement Acoustic Measuring Instruments Acoustics Elevated Railroads Instrumentation Mathematical Models Noise Noise Abatement Noise Barriers Noise Control Noise Reduction Passenger Car Design Passenger Cars Port Authority Transit Corporation Propulsion Propulsion Systems Railroad Bridges Rapid Transit Rapid Transit Cars Rapid Transit Noise Rapid Transit Railways Sound Absorption Transportation Transportation Models Vehicle Design Vehicle Power Plants
Publication/ Report Number:

UMTA-MA-06-0099-80-4;DOT-TSC-UMTA-80-22
DOI:

https://doi.org/10.21949/1526607
Resource Type:

Tech Report
Geographical Coverage:

United States
Edition:

Final report; January 1979 - April 1979
Corporate Publisher:

United States. Urban Mass Transportation Administration
Abstract:

In the report, procedures to reduce the propulsion system noise of urban rail transit vehicles on elevated structures are studied. Experiments in a laboratory use a scale model transit vehicle to evaluate the acoustical effectiveness of noise barrier walls, vehicle skirts, and undercar absorption. These experiments assume that the propulsion system noise is the only source of noise. Field measurement of urban rail transit vehicles at the Port Authority Transit Corporation (PATCO) in New Jersey provide additional data to compare the noise from elevated-structure and at-grade track sections. The results show that vehicle skirts and undercar absorption can provide a cost-effective noise reduction alternative to noise barriers if the propulsion system is the dominant noise source. The scale model results are only approximate and must be verified by full-scale demonstration tests. However, the potential value of the results can be demonstrated by applying the measured noise reductions in octave bands to the actual measured noise spectrum of the PATCO vehicle.
Format:

PDF
Funding:

DOT-TSC-16611
Collection(s):

Volpe Center
Main Document Checksum:

[+]

urn:sha256:31db2faa61abba624ea0572ebd8b752d27d786d2077057e11ad58b46a3369b3d
Download URL:

https://rosap.ntl.bts.gov/view/dot/8802/dot_8802_DS1.pdf
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Noise Control for Rapid Transit Cars on Elevated Structures: Preliminary Investigation of Vehicle Skirts, Undercar Absorption, and Noise Barriers

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