PRACTICAL MEANS OF IMPLEMENTING VEHICLE NOISE CONTROL

DEVELOPMENT OF NOISE-REDUCING MODIFICATIONS TO A TRUCK TO REDUCE ITS ISO TEST LEVEL FROM 93 TO 89.3 DBA ARE DESCRIBED, AND IT IS CONCLUDED THAT THIS IS ABOUT THE LIMIT OF FEASIBLE NOISE REDUCTION THAT CAN BE ACHIEVED BY THE VEHICLE MANUFACTURER WITHOUT ASSISTANCE FROM HIS ENGINE SUPPLIER. SOME DETAILED ENGINE MODIFICATIONS TO REDUCE NOISE ARE DISCUSSED, BUT THE MAIN AREA FOR NOISE REDUCTION LIES IN PALLIATIVE TREATMENT. SUCH TREATMENT BY ENGINE-GEARBOX ENCLOSURE AND BY ATTENTION TO THE EXHAUST SYSTEM CAN GIVE SOME 7-8 DBA REDUCTION OF NOISE. A WEIGHT PENALTY OF 10 LB/DBA AND A COST PENALTY OF 3-4 POUNDS/DBA RESULTS FROM THESE TREATMENTS. REDUCTION OF ENGINE NOISE AT SOURCE IS A LONG TERM SOLUTION. /AUTHOR/

  • Supplemental Notes:
    • Vol 13, No 4, PP 455-463
  • Authors:
    • Lewis, R P
    • Berry, W C
    • Spellacy, F
  • Publication Date: 1970-12

Media Info

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Filing Info

  • Accession Number: 00223593
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 27 1971 12:00AM