The report presents results of sound and vibration level measurements taken at the Diablo Test Track of the San Francisco Bay Area Rapid Transit System. The primary objective of these tests was to compare the performance of prototype rail fasteners with regard to wayside noise level and mechanical vibration isolation. Secondary objectives of the tests included performing measurements intended to show the relative contributions of the wheel-rail system and the propulsion system to the wayside noise and performing measurements in and beneath the cars to show the effect of different types of roadbed on the noise. Also, the evaluation of the sound barrier wall was expanded, from that presented in October, 1966, by the use of a longer barrier wall, measurements with three laboratory cars, and measurements with the car passing by on the track on the opposite side of the aerial structure, away from the wall. (Author)
Diablo Test Track Noise and Vibration Measurements
1967
56 pages
Report
No indication
English
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