Abstract
The biodynamic effects of helmet and other mass additions to the head have been of concern for more than two decades. The Naval Biodynamics Laboratory (NBDL) has performed a series of -X acceleration exposure experiments using Navy volunteers in which the dynamic response of the head was measured as a function of mass distribution variations. The kinematic response was measured for each subject with no mass addition, a helmet and weight-carrying frame, and a helmet with weights positioned on the frame symmetrically about the mid-sagittal plane. There was approximately a 30 percent addition to the head mass with these weights. Safety monitoring procedures for this investigation illustrate: (a) Computer-based methods which may apply during helmet design; and (b) experimental procedures which may be applied to assess helmet safety test and evaluation.
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