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An HPD program that looks compliant on paper often has significant gaps in practice. HPD auditing—systematic assessment of whether your program is actually protecting workers—is the only way to identify those gaps before an OSHA inspection or workers’ compensation claim does it for you. This guide covers a practical 5-domain HPD audit framework: what to assess, what records to pull, what field observations matter, and what findings should trigger immediate corrective action.
Soundtrace gives safety managers a real-time audit dashboard showing HPD fit test status, overdue refit triggers, and STS response completion across all enrolled employees.
Written HCP policy, HPD selection criteria, training curriculum, recordkeeping procedures
Enrollment dates, training records, audiograms, fit test results, STS response documentation
NRR/PAR vs. exposure levels; device types available; fit test pass/fail rates
Actual wear compliance; insertion technique; HPD condition; availability at point of use
Documentation of retraining, refitting, physician referral, and OSHA recordability review for all STS cases
Verify every employee exposed at or above 85 dBA TWA is enrolled. Common gap: new hires or job transfer workers missed during mid-cycle enrollment.
Confirm initial training at or before first HPD issuance. Confirm annual retraining within 12 months for every enrolled employee.
Baseline audiogram must have occurred before or within 6 months of first noise exposure. Annual audiograms must be within 12 months of prior.
Confirm PAR results exist for workers at 90+ dBA TWA. Flag workers with PAR below required attenuation who have not been refitted.
Every confirmed STS must have a refit record, retraining record, and physician referral. Unclosed STS cases are citation risk.
| Observation | What It Indicates | Action |
|---|---|---|
| Workers not wearing HPD in high-noise zone | Enforcement gap or HPD unavailability at point of use | Enforce use policy; add dispensers at zone entry |
| Foam earplugs not fully inserted | Training gap; technique degradation | Retrain; schedule fit testing for affected workers |
| Earmuff cushions visibly damaged | Maintenance failure; reduced attenuation | Replace cushions; add to periodic maintenance schedule |
| Workers removing HPD for communication | Wrong HPD type for task | Evaluate electronic HPD options for communication-critical roles |
| Single HPD type used across all exposure levels | Blanket selection; inadequate for some zones | Conduct exposure-based HPD selection review |
STS cases identified in the annual audiogram review but never closed out with a documented refit and retraining. An unclosed STS case is a standing OSHA citation risk—the requirement to refit and retrain upon STS confirmation is explicit in 1910.95(i)(4), and OSHA inspectors routinely check STS response records against audiogram records.
An HPD program audit is most valuable when it surfaces problems before an OSHA inspector does. The corrective actions triggered by a proactive audit are the same ones OSHA would demand—minus the citation and penalty.
See: Hearing Protection & Fit Testing: The Complete Employer Guide
Soundtrace gives safety managers a real-time dashboard of fit test status, STS response completion, and overdue refit triggers across all enrolled employees.
Book a DemoGet a quote →An HPD audit covers five domains: program documentation, employee records, device adequacy, field observation, and STS response closure. Key checks include verifying enrollment completeness, confirming training dates align with HPD issuance, reviewing fit test results against exposure levels, and ensuring every confirmed STS has a documented refit, retraining, and physician referral.
The most common gaps include employees exposed above the action level who were never enrolled, annual training records more than 12 months old, fit testing not performed for high-exposure workers, and STS cases identified but never closed with documented refit and retraining. Unclosed STS cases are among the most frequently cited HPD compliance failures.
At least annually, ideally timed with the annual audiogram review so STS cases and compliance gaps can be addressed in the same cycle. Facilities with high employee turnover or consistently high noise exposures benefit from quarterly spot audits of enrollment completeness and field wear compliance between full annual reviews.