Results 61 - 70 of 78

• Laboratory Investigation of Seat Suspension Design Performance during Vibration Testing
  11/1/2006 - Conference papers
  Researchers performed laboratory studies on four passive and two semi-active seat suspension designs. These six seat suspension systems were tested and analyzed, for vertical vibration only, using the ISO 5007 Standard.
• Field Evaluation of Seat Designs for Underground Coal Mine Shuttle Cars
  11/1/2006 - Information Circulars
  NIOSH researchers conducted a study to gather additional data to support earlier findings that NIOSH seats, with unique viscoelastic foam padding, are improved designs for coal mine shuttle cars.
• Lower Respirable Dust and Noise Exposure with an Open Structure Design
  11/1/2006 - Reports of Investigations
  This report discusses the evaluation of three types of product sizing silica sand structures: a masonry design, a steel-sided design, and an open structure design. An open structure design was superior from both a dust and noise standpoint.
• Proceedings of the First American Conference on Human Vibration
  6/1/2006 - NIOSH/USBM numbered publications
  The First American Conference on Human Vibration (ACHV) was held in Morgantown, West Virginia, June 5-7, 2006.
• Sound Power Level Study of a Roof Bolter
  1/1/2006 - Peer reviewed journal articles
  NIOSH initiated a study of a roof bolter to reduce noise exposure to mine roof bolter operators. When drilling into granite, it was found that wet drilling generated lower sound power levels and performed better than vacuum drilling.
• Administrative Controls for Reducing Worker Noise Exposures
  12/1/2005 - Peer reviewed journal articles
  This publication describes worker noise exposure surveys in coal mines and coal preparation plants, revealing that worker dosimetry, time-motion studies, and equipment noise profiling are important for effective use of administrative controls.
• Water Well Safety Bits: Health And Safety Information For The Water Well Industry
  9/1/2005 - Information Circulars
  Water well drillers are exposed to high levels of noise while working. Drillers and owners can work together to prevent noise-induced hearing loss, and measures can be taken to reduce exposure to hazardous noise.
• Assessment of Noise Controls Commonly Used on Jumbo Drills and Bolters in Western United States Underground Metal Mines
  1/1/2005 - Peer reviewed journal articles
  The noise-control treatments most commonly observed on drills and bolters during this study were evaluated on machines at underground metal mines to determine the amount of noise reduction achieved by each control.
• Noise and Vibration Reduction of a Vibrating Screen
  1/1/2005 - Peer reviewed journal articles
  This paper reports on a cooperative study on vibrating screen noise conducted at a coal preparation plant. Rubber isolators were found to reduce sound levels by 1 dB and amped side plates reduced vibration levels on the screen sides by 1 to 7 dB(A).
• Systematic Comparison of Different Seats on Shuttle Cars Used in Underground Coal Mines
  8/1/2003 - Conference papers
  A field study was conducted to evaluate four seat designs on shuttle cars, including two NIOSH-designed seats.