What does it mean when the program's STS rate decreases but workers report increasing difficulty hearing in the workplace?
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A
Subjective communication difficulty may precede measurable threshold shifts, or workers may be experiencing suprathreshold processing problems not captured by pure-tone audiometry
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B
The workers' reports are unreliable and should be disregarded
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C
The STS rate is the only valid measure, so the program is effective
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D
Workers are confused about what hearing difficulty means