3-D mechanical impedances distributed at the fingers and palm of the hand

Authors

  • Ren G. Dong Engineering and Engineering and Control Technology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV, United States
  • Daniel E. Welcome Engineering and Engineering and Control Technology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV, United States
  • Xueyan S. Xu Engineering and Engineering and Control Technology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV, United States
  • Christopher Warren Engineering and Engineering and Control Technology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV, United States
  • Thomas W. McDowell Engineering and Engineering and Control Technology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV, United States
  • John Z. Wu Engineering and Engineering and Control Technology Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, 1095 Willowdale Road, Morgantown, WV, United States

Keywords:

Resonance, Biodynamic response, Frequency ranges, Hand-arm system, Mechanical impedances, Orthogonal directions, Resonance frequencies, Vibration test system

Abstract

The driving-point biodynamic responses distributed at the fingers and palm of the hand in three orthogonal directions were examined. Seven healthy male subjects participated in the study and the experiment was carried out on a novel 3-D vibration test system. In the study, each subject was instructed to maintain grip and push forces at 30?5 N and 50?8 N, respectively, with his dominant right hand with elbow angle between 90° and 120° and shoulder abduction between 0° and 30°. Despite the considerable inter-subject variability, the responses measured along each axis consistently exhibit two magnitude peaks in the frequency range considered, which can be approximately considered as dominant resonance frequencies of the hand-arm system. The percent power absorbed in the fingers increases with the increase in frequency as the vibration becomes more concentrated in the hand and finger response becomes more independent to the remaining parts of the system.

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Published

2011-06-01

How to Cite

1.
Dong RG, Welcome DE, Xu XS, Warren C, McDowell TW, Wu JZ. 3-D mechanical impedances distributed at the fingers and palm of the hand. Canadian Acoustics [Internet]. 2011 Jun. 1 [cited 2021 Oct. 25];39(2):46-7. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/2350

Issue

Section

Proceedings of the Acoustics Week in Canada

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