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U.S. Air Force Hearing Conservation Program, Baseline ...
https://apps.dtic.mil/dtic/tr/fulltext/u2/a591603.pdf#:~:text=Significant%20Threshold%20Shift%20%E2%80%94A%20change%20in%20hearing%20thresholds,dB%20in%20either%20ear%2C%20an%20STS%20has%20occurred.
What is Considered a Standard Threshold Shift? Richard ...
https://www.audiologyonline.com/ask-the-experts/what-considered-standard-threshold-shift-367
Using OSHA criteria, a reviewer of audiograms will identify an STS (or "Standard Threshold Shift") if the hearing threshold has changed (relative to the baseline audiogram) an average of 10dB or more at 2000, 3000, or 4000 Hz in either ear. Age corrections (listed as an appendix in the OSHA standard) may be used when determining STS, although they are not …
1904.10 - Recording criteria for cases involving ...
https://www.osha.gov/laws-regs/regulations/standardnumber/1904/1904.10
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.
Audiometric threshold shift definitions: simulations and ...
https://pubmed.ncbi.nlm.nih.gov/15692305/
Objectives: Determine (1) whether pure-tone average (PTA) or "any frequency" (AF) definitions of significant threshold shift (STS) are more accurate under different conditions; (2) whether STS definitions applied twice are more accurate than when applied once; (3) whether three surrogate analysis methods applicable to real-world audiometric data can appropriately measure the …
STANDARD THRESHOLD SHIFT: FOLLOWUP AND …
https://oshainfo.gatech.edu/wp-content/uploads/2019/03/STS%20Follow%20Up%20and%20Recording%20Requirements.pdf
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. In this case
1910.95 App F - Calculations and application of age ...
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.95AppF
A threshold shift of 20 dB exists at 4000 Hz between the audiograms taken at ages 27 and 32. (The threshold shift is computed by subtracting the hearing threshold at age 27, which was 5, from the hearing threshold at age 32, which is 25). A retest audiogram has confirmed this shift.
Temporary and Permanent Noise-Induced Threshold …
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4988324/
In general, a threshold shift ≥10 dB at 2, 3 and 4 kHz is required for reporting purposes in human studies. The high-frequency regions of the cochlea are most sensitive to noise damage. Resonance of the ear canal also results in a frequency region of high noise sensitivity at 4–6 kHz. A primary noise target is the cochlear hair cell.
Hearing Conservation Program - Montana State University
https://www.montana.edu/srm/ehs/hearingconsprog.html
6.2.3 Threshold Shift A standard threshold shift is a change in hearing threshold relative to the baseline audiogram of an average of 10 dB or more at 2000, 3000, and 4000 Hz in either ear. An adjustment may be made for the contribution of aging as determined by the occupational medicine provider.
NIOSH/Criteria for a Recommended Standard ... - Noise
https://nonoise.org/hearing/criteria/criteria.htm
NIOSH recommends an improved criterion for significant threshold shift: an increase of 15 dB in the hearing threshold level (HTL) at 500, 1000, 2000, 3000, 4000, or 6000 Hz in either ear, as determined by two consecutive audiometric tests. The new criterion has the advantages of a high identification rate and a low false-positive rate.
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