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Perceived Comfort of Vertical Shock Loads

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  • Perceived Comfort of Vertical Shock Loads

    Biomch-L subscribers,
    A colleague has approached me with the following questions. Please respond to
    the address listed below.

    While standing, a person undergoes a significant vertical mechanical shock (e.
    g., 2+ g's, 0.5 sec duration triangular pulse) through ones feet (assume the
    subject is standing flat-footed):

    -What shock characteristics, such as amplitude, jerk, or frequency range,
    might correlate to the subjects highest discomfort levels? ... to
    physiological damage?

    -What might be the effects of keeping the knees fully extended, or at a slight
    flexion angle, on perceived comfort levels? ... physiological damage?

    -How would repeated shock inputs of similar or greater magnitudes effect the
    perceived comfort level and or potential for physiological damage? (Assume a
    period of 5 sec over the course of 1 hr.)

    Recommended references on similar studies would be appreciated.

    Best regards,
    Michael D. McPartland, Ph.D.

    Please respond to: