Figure. 1 VsEPs (3 repetitions for each condition) in a typical rat one week after the conclusion of a 21 day exposure (12 hours exposure per day) to 113 dB SPL broad band noise (left), to 6g acceleration impulses (above) and 3g stimuli (below). Recordings in typical non-exposed control rat are shown on the right. The peak of the first wave is indicated (P1). Due to the mechanical time delay, the onset of the linear acceleration impulse was at about 3.0 msec and not at the beginning of the trace. Before the onset of the acceleration stimulus, electro-magnetic artifact can be seen (confirmed in post-mortem control recordings).