On-Site Employee Hearing Testing: What Employers Should Expect — and How to Prepare
Who needs a test, where it happens, which records to have ready, and what comes after the provider leaves — a planning guide for plant managers and HR teams.
For a busy plant manager or HR team, employee hearing testing is a scheduling project as much as a safety task. Who needs a test? Where will it happen? What records should be ready? And what happens after the testing provider leaves?
A well-planned on-site visit makes those questions easier to manage. Employees remain at your facility, supervisors know when to release them, and your designated coordinator knows what documentation and follow-up to expect.
The need is substantial. NIOSH's statistics page, updated in April 2026, cites research using 2023 data estimating that 27 million U.S. workers — about 16% — had experienced hazardous occupational noise exposure in the preceding year. That is a national estimate, not a measure of exposure at your facility.1
U.S. workers, about 16 in every 100, exposed to hazardous noise at work in the preceding year
National estimate from NIOSH, based on 2023 data. Not a measure of exposure at your facility.
Hearing testing and noise monitoring answer different questions
Audiometric testing measures the quietest sounds a person can hear at different pitches. A baseline establishes a reference; later tests help identify changes. Noise monitoring measures exposure in the workplace. A hearing test cannot tell you how loud a production line is, and a noise survey cannot establish an employee's hearing thresholds.2
Audiometric testing
- Measures
- The quietest sounds a person can hear at different pitches
- Tells you
- Whether an employee's hearing has changed since their baseline
Noise monitoring
- Measures
- Noise exposure in the workplace
- Tells you
- How loud the work is, and which employees belong on the roster
That distinction matters when requesting services. If you already have a hearing conservation program, you may need annual testing and new-employee appointments. If exposure has never been assessed, discuss that first instead of guessing which employees belong on the roster.
Know which testing requirements apply
Under the federal OSHA general-industry standard, employees exposed at or above an eight-hour time-weighted average of 85 dBA must be included in the audiometric testing program, at no cost to them. A momentary reading of 85 dBA is not the same as an eight-hour exposure average.3
- Day 0 First exposure At or above the action level: an eight-hour time-weighted average of 85 dBA.
- 6 mo Baseline Generally within six months of first exposure at or above the action level.
- 1 yr Mobile test van exception Up to one year; hearing protection is required beyond six months until the baseline is obtained.
- Every year Annual At least annually after baseline for employees exposed at or above the action level.
These provisions come from 29 CFR 1910.95(g). Do not assume that every on-site service qualifies for the mobile-van exception. Construction, other regulated sectors, and applicable state-plan requirements should be evaluated separately.3
Prepare the visit before choosing a date
Start with a planning conversation, not just a headcount. The provider needs to understand how your workplace operates. Provide:
- Your facility address and an on-site contact
- The number of employees needing baseline and annual tests
- Shift times, break periods, and production constraints
- Your desired completion date
- Whether previous audiograms are available
- Proposed testing space and any access or visitor requirements
- Language or accessibility needs to discuss in advance
Ask for a written scope identifying what is included in the quote. Clarify minimum visit charges, travel, additional shifts, retesting, professional review, and reporting. A per-person price is easier to compare when you know what it covers.
Organize records before testing day
Create a roster with consistent employee identifiers, departments, shifts, and test types. Arrange an appropriate, secure way to transfer existing hearing records to the provider.
A practical roster also needs a status column. Mark employees as scheduled, completed, absent, or requiring follow-up. Otherwise, a busy testing day can end with uncertainty about who was missed.
| Employee ID | Department | Shift | Test | Status |
|---|---|---|---|---|
| E-1042 | Stamping | 1st | Annual | Completed |
| E-1187 | Assembly | 2nd | Baseline | Scheduled |
| E-1203 | Shipping | 1st | Annual | Absent |
| E-1219 | Stamping | 2nd | Annual | Needs follow-up |
Assign one coordinator to maintain the roster and one backup who can handle questions while that person is unavailable. Tell supervisors how schedule changes will be communicated. Avoid distributing individual hearing results through an open team spreadsheet.
Confirm that the testing location is suitable
A room that feels quiet is not automatically an acceptable audiometric testing environment. OSHA requires test rooms to meet specified background sound-pressure limits.3
Discuss these with your provider, and let the provider evaluate the location and explain what happens if conditions are unsuitable:
- Nearby machinery
- Forklift traffic
- HVAC systems
- Announcements
- Foot traffic
Keep setup, access, and privacy in the plan. A conference room that works in the morning may be booked for a meeting after lunch. Reserve the agreed space for the entire testing period, including setup and breakdown.
Give employees the right preparation instructions
For baseline tests, OSHA specifies 14 hours without workplace noise exposure, allowing hearing protectors as a substitute. Employers must also notify employees to avoid high non-work noise during that period.3
Have the provider supply instructions appropriate to the test being performed. Do not automatically apply one preparation message to baseline, annual, and follow-up appointments. NIOSH recommendations distinguish their timing and purpose, including annual tests near the end of a shift to help detect temporary changes.2
A useful employee notice explains where to go, when to arrive, who to contact if unavailable, and how to raise questions privately.
Build a schedule around the actual testing capacity
Ask your provider how many employees can be accommodated per hour with the planned setup. Do not borrow a competitor's throughput estimate: equipment, staffing, preparation, and room conditions differ.
For example, a facility might organize appointments by department so supervisors can maintain coverage. Another might prioritize a shift change to reduce scheduling conflicts. These are planning options, not guaranteed time savings.
Leave room for late arrivals, questions, and appointments that need extra attention. Decide ahead of time how absences and new hires will be handled after the main visit.
Agree on reporting and follow-up before the visit
Request a clear explanation of:
- What employees receive.
- What your authorized company contact receives.
- When preliminary and professionally reviewed results are available.
- Who handles questions, retests, and referrals.
- How records are delivered and retained.
An abnormal result is not automatically an OSHA-recordable case. Under 29 CFR 1904.10, recording generally requires a work-related standard threshold shift plus an average hearing level of at least 25 dB above audiometric zero at 2,000, 3,000, and 4,000 Hz in the same ear. Have the appropriate professional help interpret the findings and applicable recording criteria.4
- Work-relatedCaused or significantly worsened by work
- Standard threshold shiftCompared with the baseline audiogram
- 25 dB or moreAverage above audiometric zero at 2k, 3k and 4k Hz, same ear
- Generally recordable29 CFR 1904.10
The testing appointment should end with responsibilities clearly assigned — not just a report waiting in someone's inbox.
A testing-day checklist for employers
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Sources
- NIOSH — Overall Statistics, All U.S. Industries. Updated April 13, 2026; the exposure estimate references Masterson, Morata, and Themann's 2025 study of 2023 U.S. worker data
- NIOSH — Understand Noise Exposure. Updated October 28, 2026. Recommendations are distinct from OSHA requirements
- OSHA — 29 CFR 1910.95, Occupational Noise Exposure. See paragraphs (g) and (h) and Appendix D
- OSHA — 29 CFR 1904.10, Recording Criteria for Cases Involving Occupational Hearing Loss
Sources checked November 3, 2026.