Application of a Microphone Phased Array to Identify Noise Sources on a Horizontal Vibrating Screen

Details

• Personal Author:
  Camargo HE ; Matetic, Rudy J. ; Yantek, David S.
• Description:
  In coal preparation plants, workers are often exposed to sound levels exceeding 90 dB(A). Vibrating screens are viewed as a significant contributor to preparation plant noise. Reducing the sound levels generated by vibrating screens could reduce the noise exposures of preparation plant employees. The National Institute for Occupational Safety and Health (NIOSH) measured the sound power level generated by a horizontal vibrating screen with the screen either directly on the floor or on rubber isolation pads. The sound power level was 100.6 dB(A) with the screen directly on the floor. With the screen placed on isolation pads, the sound power level was 100.6 dB(A) without the belt guard rattling and 108.3 dB(A) with the belt guard rattling. The 160 Hz to 800 Hz frequency range was dominant when the belt guard was not rattling whereas the 1 to 10 kHz frequency range was most significant when the belt guard was rattling. A microphone phased array was used to examine noise sources on the screen. The belt guard, eccentric mechanisms, and steel coil springs were found to be significant noise sources. This paper will provide detailed information on the findings of the research. [Description provided by NIOSH]
• Subjects:
  Coal Coal Mining Engineering Hearing Hearing Loss Hearing Loss, Noise-Induced Minerals Mining Noise Occupational Health Safety

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• Keywords:
  Coal-workers Control-technology Engineering-controls Hearing-conservation Hearing-disorders Hearing-impairment Hearing-loss Mineral-processing Mining-industry Noise-exposure Noise-induced-hearing-loss

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• Series:
  Mining Publications
• ISBN:
  9781605605401
• Publisher:
  Institute of Noise Control Engineering of the USA
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  Indiana ; Michigan ; OSHA Region 3 ; OSHA Region 5 ; Pennsylvania
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  PRL - Pittsburgh Research Laboratory
• Topic:
  Workplace Safety & Health
• Location:
  North America
• NIOSHTIC Number:
  nn:20034242
• Citation:
  NOISE-CON 2008: Proceedings of the 2008 National Conference on Noise Control Engineering, Dearborn, Michigan, July 28-31, 2008. Burroughs C, Lim T, Kim J, Maling G, eds. Indianapolis, IN: Institute of Noise Control Engineering of the USA, 2008 Jul; :1187-1201
• Contact Point Address:
  NIOSH/PRL, 626 Cochrans Mill Road, Pittsburgh, PA 15236
• Editor(s):
  Burroughs C; Lim T; Kim J; Maling G
• Federal Fiscal Year:
  2008
• NORA Priority Area:
  Mining
• Peer Reviewed:
  False
• Source Full Name:
  NOISE-CON 2008: Proceedings of the 2008 National Conference on Noise Control Engineering, Dearborn, Michigan, July 28-31, 2008.
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:143b537809b3ad8f52ca1f29a5587da925f8b8a3addeafe7d02098a08b59ac03bdd6e825be9e148b7d7afa4a637dde1c6983c8dea27d2caf9dd1c95abe351d4a
• Download URL:
  https://stacks.cdc.gov/view/cdc/226978/cdc_226978_DS1.pdf
• File Type:
  [PDF - 2.17 MB ]