A series of noise measurements were performed on a diesel-powered heavy-duty refrigeration unit. Noise survey information collected included: polar plots of the 'A Weighted' noise levels of the unit under maximum and minimum load conditions; a linear and 'A' weighted acoustical time history of the refrigeration unit noise operating from start-up to load conditions representing both minimum (unloaded) and maximum (loaded) cooling capacity; the determination of the unmuffled refrigeration unit engine exhaust noise level under maximum and minimum load conditions; the determination of the noise contribution, under maximum load conditions, from the refrigeration unit engine exhaust and engine cooling system fan to the overall system noise.

  • Corporate Authors:

    Donaldson Company, Incorporated

    1400 West 94th Street
    Minneapolis, MN  United States  55431

    Transportation Systems Center

    55 Broadway, Kendall Square
    Cambridge, MA  United States  02142
  • Authors:
    • Retka, T J
  • Publication Date: 1976-1

Media Info

  • Pagination: 50 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00133166
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: Foma Rpt., DOT-TSC-OST-75-53
  • Contract Numbers: DOT-TSC-532
  • Files: NTIS, TRIS
  • Created Date: Jun 23 1976 12:00AM