DTIC ADA032211: The Effects of 3 Hours pdf

DTIC ADA032211: The Effects of 3 Hours

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Description of the Book:

A laboratory experiment has been conducted to investigate the effect on eight subjects of 3-hour exposures to vertical vibration, and to compare the results with the recommendations for maintaining efficiency of the International Standard ISO 2631 – ‘Guide for the evaluation of human exposure to whole-body vibration’. The vibration used was 5Hz vertical, with an acceleration level of 1.2m/sq s rms. Four tasks were used, audio vigilance, visual search, compensatory tracking by hand and handwriting. Effects on sight and hearing were checked at the beginning and end of each session. Based on average results, little evidence was found to support the time-dependency of the limits specified for 5Hz in the International Standard in that little fatigue effect was discovered. There was, however, an immediate appreciable decrement in performance of three out of the four tasks as a direct effect of the vibration, suggesting that the short-term nominal limit specified (2.8m/sq s rms for 1- 4min) is too high, for the particular tasks used

• Creator/s: Defense Technical Information Center
• Date: 1/1/1976
• Year: 1976
• Book Topics/Themes: DTIC Archive, Gray, R., Wilkinson, R. T., Maslen, K. R., Rowlands, G. F., ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (UNITED KINGDOM

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