Six subjects performed a four-limb coordination task on a shaker table driven by both single sinusoidal frequencies of 2.5 hz and 5.0 hz, as well as by an electronic mixture of 2.5 hz and 5.0 hz. Vibration acceleration was held constant at 0.69 ms-2 (0.07 gz) rms, i.e., a level below the international standard 'fatigue-decreased proficiency' boundary for 2 1/2 h vertical vibration exposures. Although vibration transmission through the body was equally as strong for the mixture comprised of only a 50% 5.0 hz component as for the pure 5.0 hz sinusoid, performance data indicated greatest overall impairment of response speed and greatest 'fatigue-decreased proficiency' under exposure to the vibration mixture. The vibration 'crest factor' is offered as a possible explanation of the results which question a basic assumption of ISO 2631-1974 that sinusoidal vibration data are directly generalisable to more realistic environmental exposures. /Author/TRRL/

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  • Corporate Authors:

    Taylor & Francis

    4 Park Square, Milton Park
    Abingdon,   United Kingdom  OX14 4RN
  • Authors:
    • COHEN, H H
    • Wassermaw, D E
    • Hornung, R W
  • Publication Date: 1977-5

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00164280
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Analytic
  • Files: ITRD, TRIS
  • Created Date: Mar 7 1978 12:00AM