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Comparison of AM CAP amplitudes in the quiet condition. (A–D) AM CAP obtained at different modulation frequencies and depths indicated in the panel titles. CTL, control group; Pre-1WPTN, 1week post-toughening noise group; 3W, 3 weeks post-high-level noise; NoPre, group without pre-exposed; Pre, group with pre-exposed. The number of asterisks shows the significant level o (*p < 0.05, **p < 0.01) of the post hoc tests (Tukey method) after one-way ANOVA.
