CAOHC Audiogram Review and STS 2

Question 1

What is the OSHA-defined standard threshold shift (STS)?

Accepted Answer

An average shift of 10 dB or more at 2000, 3000, and 4000 Hz in either ear

Answer

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.

Question 2

When reviewing an audiogram, which pattern most strongly suggests noise-induced hearing loss?

Accepted Answer

A notch at 4000 Hz with recovery at 8000 Hz

Answer

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.

Question 3

How often must OSHA-mandated audiometric testing be performed for workers in a hearing conservation program?

Accepted Answer

Annually

Answer

OSHA requires annual audiometric testing for all workers included in the hearing conservation program to monitor for changes in hearing thresholds.

Question 4

What action is required when an employee audiogram reveals a confirmed STS?

Accepted Answer

The employer must notify the employee in writing within 21 days

Answer

OSHA requires that employees be notified in writing within 21 days when their audiometric test results show a confirmed standard threshold shift.

Question 5

What is the purpose of age correction in STS determination?

Accepted Answer

To account for expected hearing loss due to aging when calculating threshold shifts

Answer

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.

CAOHC - Council for Accreditation in Occupational Hearing Conservation Practice Test

CAOHC - Council for Accreditation in Occupational Hearing Conservation Practice Test

CAOHC Audiogram Review and STS 2