Audiogram Review and STS Flashcards
6 cards from real CAOHC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Audiogram Review and STS flashcards as text
What is the OSHA-defined standard threshold shift (STS)?
Answer: An average shift of 10 dB or more at 2000, 3000, and 4000 Hz in either ear
OSHA defines STS as an average change of 10 dB or more at 2000, 3000, and 4000 Hz in either ear compared to the baseline audiogram.
When reviewing an audiogram, which pattern most strongly suggests noise-induced hearing loss?
Answer: A notch at 4000 Hz with recovery at 8000 Hz
The classic audiometric pattern of noise-induced hearing loss shows a notch at 3000-6000 Hz (typically 4000 Hz) with partial recovery at 8000 Hz.
How often must OSHA-mandated audiometric testing be performed for workers in a hearing conservation program?
Answer: Annually
OSHA requires annual audiometric testing for all workers included in the hearing conservation program to monitor for changes in hearing thresholds.
What action is required when an employee audiogram reveals a confirmed STS?
Answer: The employer must notify the employee in writing within 21 days
OSHA requires that employees be notified in writing within 21 days when their audiometric test results show a confirmed standard threshold shift.
What is the purpose of age correction in STS determination?
Answer: To account for expected hearing loss due to aging when calculating threshold shifts
Age correction tables allow employers to subtract the expected hearing threshold changes due to aging from the measured shift, potentially reducing the calculated STS value.
A revised baseline audiogram should be substituted when which condition is met?
Answer: When an STS is persistent and the audiologist determines the new audiogram better represents the worker hearing
A professional reviewer may determine that a persistent STS warrants revising the baseline so future comparisons are more clinically meaningful.