Filtering of environmental stimuli by the biomechanical properties of the body introduces deviation from power law during passive motion. A, MEMS modules (gold boxes) were placed on a person's head and directly on the seat. B–E, Population-averaged power spectra with subject (blue) and without subject (green) with power law fits superimposed (blue and green dashed lines, respectively) for yaw rotation (B), LARP rotation (C), interaural translation (D), and vertical translation (E).