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. Author manuscript; available in PMC: 2016 Sep 18.
Published in final edited form as: J Biomech. 2015 Jun 14;48(12):3469–3477. doi: 10.1016/j.jbiomech.2015.05.034

Figure 5. Aggregate distributions of frequency content.

Figure 5

Mean of normalized power spectral density (PSD) is compared between field (solid lines) and laboratory (dotted lines) for all 3 directions of (A) translational acceleration, (B) rotational acceleration, and (C) rotational velocity. Peaks correspond to common primary frequencies independent of signal amplitude and impact severity (e.g. initial velocity, drop height, etc.).