Figure 5.
Correlations between ABR thresholds and DPOAE levels across the entire hearing range for mice of different ages. A) Correlations for the middle age mice were present, but not as striking as in old age: F(1,124) =4.22, P = 0.042, r2 = 0.033. B) A greater relationship was observed in the old mice: F(1,84) =18.43, P < 0.0001, r2 = 0.18. Note: Since young adults all had excellent hearing, there were no significant relationships.
Abbreviations: ABR, auditory brain stem response; DPOAE, distortion-product otoacoustic emission.