Results 61 - 70 of 90

• Noise and Hearing Protection: Development of Two Training Exercises for Drillers
  11/1/2007 - Peer reviewed journal articles
  This article reviews the development and evaluation of two training exercises developed to inform drillers about noise, hearing loss and proper use of hearing protection, and discusses their use and availability.
• 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.
• Application of a Microphone Phased Array to Identify Noise Sources on a Roof Bolting Machine
  10/1/2007 - Conference papers
  This paper discusses the methods NIOSH used to identify noise sources on a roof bolting machine while drilling.
• Noise Assessment of Stone/Aggregate Mines: Six Case Studies
  8/1/2007 - Peer reviewed journal articles
  NIOSH completed a survey of equipment sound levels and worker noise exposures in the mining industry. The findings identify the equipment and machinery likely to cause worker overexposures and the workers found to be experiencing overexposures.
• Heavy Construction Equipment Noise Study Using Dosimetry and Time-Motion Studies
  7/1/2007 - Peer reviewed journal articles
  This research determined noise exposures of equipment operators while documenting worker task. The types of equipment studied included asphalt pavers, backhoes, bulldozers, compaction equipment, excavators, haul trucks, and wheeled loaders.
• Survey of Noise in Coal Preparation Plants
  1/1/2007 - Peer reviewed journal articles
  Noise surveys were conducted in eight coal preparation plants. Results indicate that only workers who routinely spend a significant portion of their shift in the plants (away from the control rooms) are susceptible to overexposure from noise.
• Noise Exposure and Hearing Conservation in US. Coal Mines - A Surveillance Report
  1/1/2007 - Peer reviewed journal articles
  This study examines the patterns and trends in noise exposure documented in data collected by Mine Safety and Health Administration inspectors at U.S. coal mines from 1987 through 2004.