Abstract
Three groups of guinea pigs were exposed to intense tones with frequencies of 300, 1000, or 5000 cycles, and the resulting injuries were studied in terms of the electrical responses of the cochlea. Widespread impairments were found, with no specific relation to the exposure frequency. Considerable individual differences were observed, particularly for 300 cycles. Though the avg. impairment was similar in amt. for the 3 exposure groups, the individual ears showed no clear relation between degree of injury and sensitivity to the exposure tone.

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