Low-Frequency Noise Effects in Residential Buildings Along a Bus Rapid Transit (BRT) Route

摘要

The results of the initial measurements in the South End neighborhood along the MBTA Silver LineBRT route in Boston, MA indicated that idling Neoplan buses were generating low-frequency noise withlevels high enough to cause vibration and rattling inside nearby residences. When idling at 700 rpm, thebus engine was found to generate a tone at 35 Hz that emanated from the exhaust, causing audible lowfrequencynoise inside the homes and exciting vibration of the building walls and attached objects. Inaddition, a comparison of the results in Boston with the stationary field test data suggests that there aresignificant sound reflections at the Boston site that may be exacerbating the problem there.