FIG. 1.

Example of the time-pressure profile of a shockwave recorded near the head of the mouse. The shockwave (mean velocity 478.35 m/sec) was recorded by a pencil gauge positioned near the head of the animals. The initial ambient pressure (0 psi) increased to a mean peak positive pressure of 15.74 psi (seen adjacent to the small triangle, Δ), duration 5.31 ms, and impulse 0.04 psi•ms, followed by a peak negative pressure (−3.88 psi) phase of 8.48-ms duration. The maximum pressure attained of ∼23 psi, seen as a secondary peak, results from a reflection of the incoming wave on the holder and adjacent instrumentation.