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The National Institute for Occupational Safety and Health (NIOSH)





Mining Publication: In-Cab Noise Reduction on an Air-Rotary Drill Rig
Keywords: Cabs Drills Noise and vibration control Sound level Soundproofed enclosures
Original creation date: May 2007
Authors: DS Yantek, DK Ingram, RJ Matetic
Peer Reviewed Journal Article - May 2007
Download PDF Document (18.15 MB)
NIOSHTIC2 Number: 20032229
Noise Control Eng J 2007 May-Jun; 55(3):294-310
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.
Image of publication In-Cab Noise Reduction on an Air-Rotary Drill RigPeer Reviewed Journal Article - May 2007
Download PDF Document (18.15 MB)
NIOSHTIC2 Number: 20032229
Noise Control Eng J 2007 May-Jun; 55(3):294-310
See Also
Analysis of a Mechanism Suspension to Reduce Noise from Horizontal Vibrating Screens
Determination of Sound Exposures (DOSES): Software Manual and Implementation Guide
Development of Roof-Bolting Machine Bit and Chuck Isolators for Drilling Noise Reductions
The Evolution of Drill Bit and Chuck Isolators to Reduce Roof Bolting Machine Drilling Noise
Mining Haul Truck Cab Noise: An Evaluation of Three Acoustical Environments
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
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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