Figure 4.

Comparison of wideband (WB) emissions as a function of time during sonications in mice breathing either oxygen or medical air. Every five recordings were binned, and the probability for wideband emission was found for each bin. The mean signal and number of sonications that had signals greater than two standard deviations above zero were calculated for each bin. This threshold is noted by the dashed line. At the higher exposure levels (N=2 animals, 8 locations), both the strength of the wideband signal and the probability of enhanced emissions were greater in mice breathing air. However, for the locations sonicated at lower pressure amplitudes (N=5 animals, 20 locations), the largest signals were recorded when the mice were breathing oxygen. For each bin, when the signals were significantly different, it is noted by asterisks (* P<0.05; ** P<0.01).