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Standard threshold shift calculator

CG6215.pdf. How to Calculate a Significant Threshold Shift - uscg 2026

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The document provides a step-by-step guide on how to calculate a Significant Threshold Shift (STS) in hearing levels for individuals, specifically focusing on the frequencies of 2000, 3000, and 4000 Hz. It outlines the process of subtracting baseline audiogram values from current audiogram values and determining if there is a significant change in hearing based on specific dB thresholds.

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Click ‘Get Form’ to open it in the editor.
Begin by entering the date for the Current Audiogram section. Fill in the left and right ear values for 2000 Hz, 3000 Hz, and 4000 Hz under 'Current Audiogram'. Sum these values for each ear.
Next, enter the date for the Baseline Audiogram section. Similarly, input the left and right ear values for 2000 Hz, 3000 Hz, and 4000 Hz. Calculate the sum for each ear.
Subtract the summed Baseline Audiogram from the summed Current Audiogram for both ears. Input these differences in the designated fields.
Finally, divide each ear's difference by three to calculate the STS. Enter these results in their respective fields.

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What are the OSHA requirements for STS?

Employers must compare annual audiograms to baseline audiograms to determine whether the audiogram is valid and whether the employee has lost hearing ability or experienced a standard threshold shift (STS). An STS is an average shift in either ear of 10 dB or more at 2,000, 3,000, and 4,000 hertz.

How to calculate threshold rate?

3: Lactate Threshold Heart Rate (LTHR) Method Your LTHR is approximately 95% of your average heart rate for the last 20 minutes. For example, if your average heart rate during the last 20 minutes of a 30-minute time trial is 170 bpm, your LTHR would be approximately 161 bpm (170 x 0.95).

What is a standard threshold shift?

A Standard Threshold Shift, or STS, is defined in the occupational noise exposure standard at 29 CFR 1910.95(g)(10)(i) as a change in hearing threshold, relative to the baseline audiogram for that employee, of an average of 10 decibels (dB) or more at 2000, 3000, and 4000 hertz (Hz) in one or both ears. 1904.10(b)(2)

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