Results 31 - 40 of 78

• Less Sound Underground: Reducing Roof Bolting Machine Drilling Noise
  4/1/2010 - Conference papers
  This article presents the most significant findings from NIOSH research to develop noise controls that reduce the sound at the operator’s position of mining machinery.
• A Control Suite to Reduce Roof Bolting Machine Drilling Noise
  4/1/2010 - Conference papers
  NIOSH conducted research to reduce the noise emission of various underground coal-mining equipment and developed a suite of controls to reduce drilling noise.
• The Development of a Damped Drill Steel to Reduce Roof Bolting Machine Drilling Noise
  4/1/2010 - Conference papers
  The paper documents NIOSH research to date of a damped drill steel on a roof bolting machine.
• Technology News 539 - Identifying The Benefits Of Engineering Noise Controls Through A Business Case
  12/1/2009 - Technology News
  NIOSH has been performing research to develop a business case that promotes adoption of noise controls by reducing barriers to industry acceptance and enhancing drivers that foster their implementation.
• Technology News 538: Acoustic Enclosure to Reduce Noise From Vibrating Screen Mechanism Housings
  11/1/2009 - Technology News
  NIOSH has been performing research to reduce operator exposure to noise from vibrating screens at coal preparation plants.
• Development of Roof-Bolting Machine Bit and Chuck Isolators for Drilling Noise Reductions
  11/1/2009 - Conference papers
  NIOSH is developing bit and chuck isolators to reduce vibration, and thus noise radiation of the drill steel, with the longer-term goal of reducing roof bolting machine operator noise exposure.
• A Comparison of Beamforming Processing Techniques for Low Frequency Noise Source Identification in Mining Equipment
  11/1/2009 - Conference papers
  This paper describes NIOSH research to develop noise controls for mining equipment whose operators exceed the Permissible Exposure Level (PEL). Two alternative approaches are explored to the conventional beamforming algorithm.
• Structural Vibration as a Noise Source on Vibrating Screens
  11/1/2009 - Conference papers
  For horizontal vibrating screens, NIOSH testing indicates that the screen sides and feed box are dominant noise sources for the 250 Hz through 800 Hz one-third octave bands, while the electric motor is the most significant source for the 1 kHz band.
• Mining Haul Truck Cab Noise: An Evaluation of Three Acoustical Environments
  10/1/2009 - Peer reviewed journal articles
  This study examines noise exposure inside haul truck cabs during a typical workday involving normal operator practices, the effect of cab noise reduction features, the consequence of disabling noise controls, and the significance of maintenance.
• A Dual Sprocket Chain as a Noise Control for a Continuous Mining Machine
  9/1/2009 - Peer reviewed journal articles
  A dual sprocket conveyor chain for a CMM was examined both in the laboratory and in underground field studies to test the influence on lowering the sound power emissions of the chain conveyor of a CMM when compared to a standard chain.