We found a significant effect of increasing occupational noise exposure on DIN thresholds for the exposed group (the second regression model), but only a nonsignificant trend for the effect of some exposure versus no exposure (i.e., the first regression model).
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Noise Exposure in Palestinian Workers Without a Diagnosis of Hearing Impairment: Relations to Speech-Perception-in-Noise Difficulties, Tinnitus, and Hyperacusis.
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