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Cochleograms were recorded 28 days after 112dB broad band noise exposure for 2 hours (centered at 0.5–8.0 kHz). A massive loss of outer hair cells was observed in the basal region with widespread loss in the middle turn and moderate loss towards the apex. The inner hair cells indicated a 40% loss in the region expected for the noise while adjoining areas on both sides had a small to moderate loss. Cochleograms recorded in 3 animals were averaged.
