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Permanent threshold shifts (PTS) for ABR and DPOAE at 16kHz for mice exposed to noise during various ages (mean ± SD). The vertical dashed line denotes the age of exposure (10 weeks) at which the PTS for DPOAE has dropped significantly (p = 0.0099) without a corresponding change in PTS for ABR (p > 0.05), and at 12 weeks, PTS for ABR has diminished significantly as well (p = 0.000902).
