Frequency Weighting Derived from Power Absorption of Fingers-Hand-Arm System Under Z(h)-Axis Vibration

Details

• Personal Author:
  Dong, Ren G. ; McDowell, Thomas W. ; Schopper AW ; Welcome DE ; Wu, John Z.
• Description:
  The objectives of this study are to derive the frequency weighting from three vibration power absorption (VPA) methods (finger VPA, palm VPA, and total or hand VPA), and to explore whether these energy methods are better than the currently accepted acceleration method. To calculate the VPA weightings, the mechanical impedance of eight subjects exposed to a broadband random vibration spectrum in the z(h)-axis using 18 combinations of hand couplings and applied forces was measured. The VPA weightings were compared with the frequency weighting specified in ISO 5349-1 [2001. Mechanical Vibration--Measurement and Evaluation of Human Exposure to Hand--Transmitted Vibration--Part 1: General Requirements. International Organization for Standardization, Geneva, Switzerland]. This study found that the hand and palm VPA weightings are very similar to the ISO weighting but the finger VPA weighting for the combined grip and push action is much higher than the ISO weighting at frequencies higher than 25 Hz. Therefore, this study predicted that the total power absorption of the entire hand-arm system is likely to be correlated with psychophysical response or subjective sensation. However, if the ISO weighting method cannot yield good predictions of the vibration-induced disorders in the fingers and hand, the hand and palm energy methods are unlikely to yield significantly better predictions. The finger VPA is a vibration measure between unweighted and ISO weighted accelerations. The palm VPA method may have some value for studying the disorders in the wrist-arm system. [Description provided by NIOSH]
• Subjects:
  Biomechanical Phenomena Musculoskeletal System Occupational Health Safety Vibration
• Keywords:
  Arm-injuries Biomechanics Hand-injuries Vibration-control Vibration-effects Vibration-exposure
• ISSN:
  0021-9290
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  HELD - Health Effects Laboratory Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  39
• Issue:
  12
• NIOSHTIC Number:
  nn:20031017
• Citation:
  J Biomech 2006 Oct; 39(12):2311-2324
• Contact Point Address:
  Engineering and Control Technology Branch, HELD, National Institute for Occupational Safety and Health, CDC, MS L-2027, 1095 Willowdale Road, Morgantown, WV 26505, USA
• Email:
  rkd6@cdc.gov
• Federal Fiscal Year:
  2007
• NORA Priority Area:
  Disease and Injury: Musculoskeletal Disorders of the Upper Extremities
• Peer Reviewed:
  True
• Source Full Name:
  Journal of Biomechanics
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:c1fee3708e9045b46ac42605d66b4dbe220c81d328a8f65e9ba37a18d75b1aea834b2972b643ccfe6e2c63016afaefdcc3411d3f5178cfe62ba7bc2752c2bf26
• Download URL:
  https://stacks.cdc.gov/view/cdc/191414/cdc_191414_DS1.pdf
• File Type:
  [PDF - 305.46 KB ]