SOUND REDUCTION OF EARTH-MOVING MACHINERY
THE FOLLOWING NOISE SOURCES OF EARTH MOVING MACHINERY ARE DESCRIBED: (1) EXHAUST NOISE, (2) COOLING FANS, (3) NOISE RADIATED BY ENGINE, (4) COMBUSTION AIR INTAKE NOISE, (5) ACCESSORY NOISE, AND (6) OPERATOR LOCATION NOISE. EXPERIENCE HAS SHOWN THAT EXHAUST AND COOLING FAN NOISE HAVE BEEN THE MAJOR PROBLEMS AS AN OBSERVER HEARS A VEHICLE. RADIATION DIRECTLY FROM DIESEL ENGINES CAUSES A DISTINCT SOUND THAT IS ANNOYING TO SOME PRIMARILY BECAUSE OF ITS CHARACTER. THE USE OF TURBO-CHARGERS MAY RESULT IN SOME OBJECTIONABLE NOISE, PERHAPS BECAUSE NO MUFFLERS ARE USED, AND SOMETIMES BECAUSE THE TURBO-CHARGER OPERATION RESULTS IN EXCESSIVE WHINE. FUTURE TRENDS CALL FOR QUIETER EQUIPMENT OF ALL SORTS.
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Supplemental Notes:
- Paper sponsored by Committee on Highway Equipment. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
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Authors:
- Groening, James A
- Publication Date: 1969
Media Info
- Media Type: Digital/other
- Features: Figures;
- Pagination: pp 6-11
- Monograph Title: Highway equipment studies, construction management, noise and air pollution bibliography
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Serial:
- Highway Research Record
- Issue Number: 278
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Combustion; Construction equipment; Cooling; Diesel engines; Earthwork; Engines; Excavating equipment; Exhaust gases; Fans; Mufflers; Noise; Noise control; Turbochargers
- Old TRIS Terms: Coolers; Engine noise; Turbocharging
- Subject Areas: Environment; Highways; Vehicles and Equipment;
Filing Info
- Accession Number: 00219354
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Sep 29 1994 12:00AM