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AMA
Audiogram Comparison Tool
Reference vs Monitoring · AS/NZS 1269.4:2014 · NAL 80
Reference vs Monitoring · AS/NZS 1269.4:2014
Audiogram Comparison Tool
Enter reference and monitoring audiogram thresholds below. Results include Significant Threshold Shift assessment (AS/NZS 1269.4:2014 Clause 4.10 / 9.3) and NAL 80 Table 1 / Figure 2 assessment.
Reference (Baseline) Audiogram● Right & ✕ Left — dBHL
Monitoring Audiogram● Right & ✕ Left — dBHL
Age Correction — ISO 7029 / AS/NZS 1269.4 Annex E (Optional)
Enter the date the reference audiogram was taken and select sex to optionally apply ISO 7029:2017 age correction. This subtracts expected presbycusis changes from threshold shifts, helping isolate noise-induced hearing loss. Results will show both raw and age-corrected shifts.
How it works: Age correction = H(age at monitoring) − H(age at reference), where H is the ISO 7029:2017 median expected threshold for the worker's sex and age at each frequency. Corrected shifts ≤ 0 dB are shown as 0. DOB and Assessment Date are used for the monitoring age; the reference date above for the reference age.
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NAL 80 — Clinical Indicator (C4)
Criterion C4 covers clinically significant findings from health history or otoscopic examination. Check the box below if any relevant indicators are present.