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. Author manuscript; available in PMC: 2012 Dec 21.
Published in final edited form as: J Proteomics. 2011 Aug 16;75(2):410–424. doi: 10.1016/j.jprot.2011.08.007

Figure 3. Noise-induced permanent threshold shift.

Figure 3

DPOAEs recorded in three animals before and 1 day, 7days and 28 days after noise exposure indicate a shift in the permanent hearing threshold. The distortion product amplitudes at f2 frequency 8 kHz and 16 kHz showed a mild recovery 7 days after noise exposure and a moderate recovery after 28 days. Nevertheless, the amplitude was 10 to 20 dB lower than the pre exposure levels. The results are expressed as mean ± standard error, n = 3.