Masking Of Impaired Ears By Noise

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Abstract
31 normal hearing university students were compared with 17 adults with conductive losses and 42 adults with perceptive losses for puretone and spondee thresholds in quiet and in 2 levels of white noise to test the hypothesis that such noise would produce the same amount of masking in an ear which is impaired as it would produce in a normal ear. The number of abnormal M-Z relationships which were found in the data obtained for hypacoustic subjects tended to invalidate the hypothesis. Results suggest that the concept of the "critical band," as formulated by Fletcher and others may have limited applicability, especially if the impairment is of the perceptive type.

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