Results 51 - 60 of 78

• Application of Prevention through Design for Hearing Loss in the Mining Industry
  2/1/2008 - Peer reviewed journal articles
  This paper describes the quiet-by-design approach of a noise control that reduced exposures of continuous mining machine operators by 3dB(A) using the four functional areas of Prevention through Design - Practice, Policy, Research, and Education.
• Practical Application of a Partial Cab to Reduce the A-Weighted Sound Level at the Operator's Station on Surface Drill Rigs
  12/1/2007 - Peer reviewed journal articles
  This paper discusses the results of a collaboration with a local drilling company to design and install a partial cab between the operator and the drill steel in an effort to reduce the sound level at the operator station of a surface drill rig.
• Development and Evaluation of a Urethane Jacketed Tail Roller for Continuous Mining Machines
  11/1/2007 - Conference papers
  This paper details laboratory noise testing results of a continuous mining machine conveyor system which uses a coating for the tail roller designed to help bring the continuous mining machine into compliance with federal noise regulations.
• Measurement Method for Determining Absorption Coefficients for Underground Mines
  11/1/2007 - Peer reviewed journal articles
  This paper presents a method using a ray-tracing technique to determine absorption coefficients for underground mines. Absorption coefficients are determined and presented for octave bands from 63 Hz to 8 kHz.
• Results of Noise Measurements from Underground Testing of a Roof Bolting Machine Duty Cycle
  10/1/2007 - Conference papers
  This paper evaluates the duty cycle of a typical roof bolting machine operation at two coal mines. The results provide insight into which portion of the operators’ duty cycle is the most prominent contributor to noise exposure.
• Determining Underground Roof Bolting Machine Operators Noise Exposure Using Laboratory Results
  10/1/2007 - Conference papers
  This paper provides a method for predicting sound pressure levels at the operator’s position of a roof bolting machine in an underground coal mine using sound power levels determined in the laboratory.
• Technology News 527 - The Partial Cab: A New Noise Engineering Control for Surface Drill Rigs
  8/1/2007 - Technology News
  NIOSH, in partnership with stakeholders in the mining and surface drilling industries, conducted research to develop engineering controls to reduce workplace noise exposure. The result of this partnership is the development of a partial cab.
• Partial Cab Video and Information Suite
  8/1/2007 - PC software, Presentations
  Partial cab information suite containing instructions for building a cab to reduce sound levels by as much as 9 dB on surface air rotary drills.This can reduce the risk of noise-induced hearing loss.
• In-Cab Noise Reduction on an Air-Rotary Drill Rig
  5/1/2007 - Peer reviewed journal articles
  This paper summarizes a NIOSH investigation of engineering noise controls to reduce sound levels in cabs on air-rotary drill rigs. Results revealed that some drillers are exposed to A-weighted sound levels exceeding 85 dB even though a cab is used.
• Underground Evaluation of Coated Flight Bars for a Continuous Mining Machine
  12/1/2006 - Conference papers
  A highly durable polyurethane coating has been developed for chain flights to decrease noise from metal-on-metal impacts. This paper evaluates this engineering noise control in reducing the noise exposure of continuous mining machine operators.