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. 2020 May 15;14(1):61–68. doi: 10.21053/ceo.2019.01662

Fig. 2.

Fig. 2.

Hearing thresholds increased after noise exposure in all groups. Hearing thresholds were measured before and 1 day after noise exposure. (A) Baseline hearing thresholds were normal in all experimental groups. (B) Hearing thresholds increased significantly 1 day after noise exposure in all groups and reached >80 dB SPL. Error bars indicate standard deviation. SPL, sound pressure level; OP, ovariectomy; ET1, low-dose estrogen replacement therapy; ET2, high-dose estrogen replacement therapy.