Results 31 - 40 of 90

• Noise Controls for Vibrating Screen Mechanisms
  1/1/2011 - Peer reviewed journal articles
  NIOSH is currently developing noise controls for horizontal vibrating screens.
• Acoustic Assessment of Pneumatic and Electric Jackleg Drills used in the Mining Industry
  4/1/2010 - Conference papers
  This paper presents an acoustic assessment of pneumatic and electric jackleg drills involving Noise Source Identification (NSID), penetration rate measurements, operator’s cumulative noise dose measurements, and determination of sound power levels.
• 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.
• 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.
• Assessment of Equipment Operator's Noise Exposure in Western Underground Gold and Silver Mines
  3/1/2010 - Peer reviewed journal articles
  This report contains the description of studies conducted at U.S. western hard-rock mines to determine the levels of noise exposure of the miners.
• NIOSH Tools For Hearing Loss Prevention Programs
  2/1/2010 - Conference papers
  NIOSH has developed several new hearing loss prevention tools and interventions that specifically target behavioral and attitudinal barriers that keep miners from effectively acting to prevent their own hearing loss.
• 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.