In-Cab Noise Reduction on an Air-Rotary Drill Rig

Details

• Personal Author:
  Ingram, David K. ; Matetic, Rudy J. ; Yantek, David S.
• Description:
  The National Institute for Occupational Safety and Health (NIOSH) has investigated engineering noise controls to reduce sound levels in cabs on air-rotary drill rigs. A recent investigation revealed that some drillers are exposed to A-weighted sound levels exceeding 85 dB even though a cab is used. NIOSH studied the in-cab sound levels of one such rig. First, preliminary tests were conducted in a controlled environment using accelerometers and microphones with spectral analysis to identify the dominant noise sources for in-cab sound levels. The results indicate that vibration transmitted from multiple hydraulic pumps to the control panel produces a dominant spike in the sound level spectrum in the 400 Hz 1/3-octave band. Next, field tests were performed in a production environment to evaluate noise controls to reduce in-cab sound levels. It was found that utilizing hydraulic noise suppressors reduces the structure borne noise transmitted to the control panel. Further, using hydraulic noise suppressors and enhancing soundproofing reduced the in-cab A-weighted sound levels by as much as 4 dB. [Description provided by NIOSH]
• Subjects:
  Engineering Mining Noise Noise, Occupational Occupational Health Safety
• Keywords:
  Control-technology Engineering-controls Mining-equipment Mining-industry Noise-control Noise-exposure Noise-levels Noise-sources Sound-attenuation Sound-propagation
• Series:
  Mining Publications
• ISSN:
  0736-2501
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRL - Pittsburgh Research Laboratory
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  294-310
• Volume:
  55
• Issue:
  3
• NIOSHTIC Number:
  nn:20032229
• Citation:
  Noise Control Eng J 2007 May-Jun; 55(3):294-310
• Contact Point Address:
  NIOSH Pittsburgh Research Laboratory, P.O. Box 18070, Pittsburgh PA 15236
• Email:
  DYantek@cdc.gov
• Federal Fiscal Year:
  2007
• Peer Reviewed:
  True
• Source Full Name:
  Noise Control Engineering Journal
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:867c7579c9426454a4c1de4f9e75f5f0a455a1df774fbf7215ebbb4f40458fb9fcf1825c84fc2023d7c39c51831b83c5f88f708b88df1918158b03c3d5ff038b
• Download URL:
  https://stacks.cdc.gov/view/cdc/226771/cdc_226771_DS1.pdf
• File Type:
  [PDF - 1.96 MB ]