Evaluation of Stiffeners for Reducing Noise from Horizontal Vibrating Screens

Details

• Personal Author:
  Yantek, David S.
• Description:
  Sound levels around vibrating screens in coal preparation plants often exceed 90 dB(A). The National Institute for Occupational Safety and Health (NIOSH) is developing noise controls to reduce noise generated by horizontal vibrating screens. NIOSH researchers used finite element analysis (FEA) and a NIOSH-written program to estimate the sound power level reduction resulting from adding rib stiffeners to key locations on the sides of a screen. The researchers evaluated adding rib stiffeners made from steel channel with two different cross-sections (C and T) and the effects of orienting the stiffeners horizontally and vertically. In addition, the researchers investigated the effects of increasing the modal damping from 0.002 to 0.010. The results indicate that for a broadband input, adding stiffeners had little impact on the estimated sound power level, but increasing the modal damping reduced the predicted A-weighted sound power level by 7.8 dB. [Description provided by NIOSH]
• Subjects:
  Coal Engineering Environmental Monitoring Hearing Hearing Loss Hearing Loss, Noise-Induced Mining Noise Noise, Occupational Occupational Exposure Occupational Health Safety Vibration Workplace

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• Keywords:
  Coal-processing Engineering-controls Exposure-assessment Exposure-levels Exposure-methods Hearing-loss Mining-industry Noise-control Noise-induced-hearing-loss Noise-levels Noise-measurement Noise-sources Occupational-exposure Sound-attenuation Statistical-analysis Vibration-control Vibration-effects Vibration-exposure Vibration-suppressors Work-environment Work-operations Work-performance Work-practices

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• Series:
  Mining Publications
• Publisher:
  Institute of Noise Control Engineering of the USA
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  Indiana ; Maryland ; OSHA Region 3 ; OSHA Region 5 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  OMSHR - Office of Mine Safety and Health Research
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  1-14
• NIOSHTIC Number:
  nn:20036771
• Citation:
  NOISE-CON 2010: Proceedings of the 2010 National Conference on Noise Control Engineering and 159th Meeting of the Acoustical Society of America, April 19-21, 2010, Baltimore, Maryland. Burroughs CB, Maling G eds. Indianapolis, IN: Institute of Noise Control Engineering of the USA, Paper No. NC 10-147, 2010 Apr; :1-14
• Contact Point Address:
  David S. Yantek, NIOSH/OMSHR, PO Box 18070, Pittsburgh, PA 15236
• Email:
  dyantek@cdc.gov
• Editor(s):
  Burroughs CB; Maling G
• Federal Fiscal Year:
  2010
• NORA Priority Area:
  Mining
• Peer Reviewed:
  False
• Source Full Name:
  NOISE-CON 2010: Proceedings of the 2010 National Conference on Noise Control Engineering and 159th Meeting of the Acoustical Society of America, April 19-21, 2010, Baltimore, Maryland
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:68b1410ffb04fd343c73fa78c7acdc1dd1017911941fe1f3f464ee694284e222c9ddc6564e0831e15903d3edc18f6df8f833225341bcca4365f1aea590e6dd2f
• Download URL:
  https://stacks.cdc.gov/view/cdc/227206/cdc_227206_DS1.pdf
• File Type:
  [PDF - 1.88 MB ]