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Title	FEASIBILITY STUDY OF NOISE CONTROL MODIFICATION FOR AN URBAN TRANSIT BUS
Accession No	00262463
Authors	Murray, W S; Swetnam, GFJ
Period Covered	7203-7209
Corp. Authors / Publisher	Mitre Corporation
Publication Date	19730117
Description	3 p.
Abstract	An investigation has been conducted to determine the feasibility of reducing exterior acoustic noise produced by an urban transit bus. The noise characteristics of the bus were studied and a number of noise-reducing modifications were designed to attack the principal sources. The modifications included an experimental radiator fan, muffling devices for the engine air inlet and exhaust systems, and a partial enclosure for the engine compartment. Noise tests were performed on the unmodified bus and on the bus equipped with all modifications. Several tests were made with one modification removed each time to determine its individual contribution. A-weighted sound level measurements and octave-band frequency plots are presented to show the effect of the individual noise-reducing modifications. /Author/
TRT Terms	Bus transportation ; Buses ; Engines ; Intercity bus lines ; Noise ; Noise control ; Sound level ; Testing
Other Terms	Bus transportation (Intercity); Buses (Vehicles); Engine noise; Noise level
Subject Areas	U11 BUS & PARATRANSIT VEHICLE TECHNOLOGY; U48 ENERGY & ENVIRONMENT; H52 HUMAN FACTORS
Report Number	MTR-6272-Rev-2 Final Rpt.
Availability	National Technical Information Service Order Number: PB-220364/4
Document Source	National Technical Information Service Source Data: PB-220364/4
TRIS Files	UMTRIS; HRIS
Database	TRIS Online

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