Figure 1
From: Noise induced hearing loss impairs spatial learning/memory and hippocampal neurogenesis in mice

Noise-induced hair cell loss and ABR threshold shift measured 3 months after the noise exposure at 6–8 weeks of age.
(A–D) Representative images of SDH staining of HCs from the two groups. (A,B) Apical and basal turns, respectively, in the control group; (C,D) Apical and basal turns, respectively, in the noise group. Massive OHC loss is clearly observed in (D). (E) Cochleogram of the noise-exposed animals showing the loss of OHCs concentrated in the basal half of the cochlea. (F) ABR thresholds. The differences between the two groups show that moderate-to-severe hearing loss was established in the noise group.