Higher magnification comparison between control and tone-exposed saccular epithelia. Phalloidin-labeled saccular epithelia viewed under a 100× objective showing evidence of differential hair cell bundle loss between control (A) and 4000 Hz tone-exposed (B) saccules at location 5. Arrow heads = presumed newly forming hair cell bundles. Arrows = bundleless hair cells. Asterisks = damaged stereocilia. Scale bars = 5 μm.