|1||2005 - 09/09/2005 - Revising baseline audiogram when there is a standard threshold shift in only one ear.|
|2||2003 - 05/08/2003 - Baseline audiogram revision due to persistent STS or improved thresholds; revision must be made for each ear separately.|
|3||1989 - 11/17/1989 - Identification of a standard threshold shift (STS) for individuals with a very poor sense of hearing.|
|#||Regulations (Standards - 29 CFR)|
|1||1910.95 - Occupational noise exposure.|
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