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The National Institute for Occupational Safety and Health (NIOSH)





Mining Publication: Noise Controls for Vibrating Screen Mechanisms
Keywords: Coal Noise Noise and vibration control Processing plants Sound level
Original creation date: January 2011
Authors: MJ Lowe, DS Yantek, HE Camargo, LA Alcorn
Peer Reviewed Journal Article - January 2011
Download PDF Document (5.75 MB)
NIOSHTIC2 Number: 20040455
Trans Soc Min Metal Explor TP-10-027, 2012 Jan; 330:446-451
National Institute for Occupational Safety and Health (NIOSH) studies show that 43.5% of surveyed coal preparation plant workers had noise exposures exceeding the Mine Safety and Health Administration Permissible Exposure Level. Sound levels around vibrating screens in these plants often exceed 90 dB(A). NIOSH is currently developing noise controls for horizontal vibrating screens. To characterize noise sources, NIOSH researchers performed sound pressure level (SPL) measurements on a vibrating screen at their Pittsburgh Research Laboratory. The results show that the entire screen contributes to noise below 1 kHz and the vibration mechanism housings are most significant above 1 kHz. Constrained layer damping (CLD) treatments and an enclosure were used to reduce mechanism housing noise. These were evaluated using sound power level measurements according to ISO 3744. The CLD treatments reduced the A-weighted sound power level by 3.1 dB in the 1 to 10 kHz one-third-octave bands. A panel-on-frame vibration mechanism enclosure using various types of panels further reduced the A-weighted sound power level from the CLD configuration in the 1 to 10 kHz one-third-octave bands by 3.7, 4.0, and 3.9 dB for aluminum, steel, and Dynalam panels, respectively. The combination yielded a 7 dB reduction from baseline in A-weighted sound power for the same frequency range.
Image of publication Noise Controls for Vibrating Screen MechanismsPeer Reviewed Journal Article - January 2011
Download PDF Document (5.75 MB)
NIOSHTIC2 Number: 20040455
Trans Soc Min Metal Explor TP-10-027, 2012 Jan; 330:446-451
See Also
Analysis of a Mechanism Suspension to Reduce Noise from Horizontal Vibrating Screens
Determination of Sound Exposures (DOSES): Software Manual and Implementation Guide
Less Sound Underground: Reducing Roof Bolting Machine Drilling Noise
Noise and Vibration Reduction of a Vibrating Screen
A Noise Control for A Roof Bolting Machine: Collapsible Drill Steel Enclosure
Practical Application of a Partial Cab to Reduce the A-Weighted Sound Level at the Operator's Station on Surface Drill Rigs
Results of Noise Measurements from Underground Testing of a Roof Bolting Machine Duty Cycle
Structural Vibration as a Noise Source on Vibrating Screens
Technology News 536 - NIOSH Develops New Software to Analyze and Reduce Noise Exposure
Water Well Safety Bits: Health And Safety Information For The Water Well Industry
Page last reviewed: September 21, 2012
Page last updated: September 21, 2012
Content source: National Institute for Occupational Safety and Health, Mining Program
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