Mobile Van vs. In-House Hearing Testing: A Cost Comparison

Every employer with workers exposed to noise at or above an 85 dBA eight-hour time-weighted average must run a hearing conservation program under OSHA 29 CFR 1910.95 — and that means a baseline audiogram for each exposed employee and a new audiogram every year after that. For most safety and EHS managers, the question isn't whether to test, it's how: bring in a mobile testing van, send people to a clinic, or run the testing yourself.

Each option has a real place. This guide walks through what each one costs, where the hidden costs sit, and how to tell which model fits your sites and headcount.

The three ways employers get audiograms done

• Mobile testing van: A contractor parks a van with multiple sound-treated booths at your site and tests employees in batches, usually over one or two days per year.
• Clinic referral: Employees travel to an occupational health clinic or audiology practice for their annual test.
• In-house testing: A trained employee (or a contracted technician working in your space) tests workers on-site with your own audiometer, on your schedule.

All three can be fully compliant. OSHA doesn't care who runs the audiometer as long as the tester is qualified, the equipment meets ANSI S3.6 and is calibrated, the room meets the ambient noise limits in Appendix D, and results are reviewed and recorded properly. See our OSHA hearing conservation guidelines for the full requirements.

What mobile hearing testing costs

Mobile van pricing is usually quoted per employee tested, sometimes with a separate mobilization or trip fee for each visit. Typical quotes vary widely by region, volume, and vendor, but as a rough guide:

• Per-employee fee: often roughly $20–$50 per audiogram
• Mobilization or trip fee: some vendors add a flat fee per site visit, especially for smaller groups or remote locations
• Retests and missed employees: anyone absent on van day may need a second visit, a clinic referral, or wait until next year

These are approximate figures, not sourced benchmarks. The only numbers that matter are the ones on your own quotes, so get two or three before you compare.

The costs that don't appear on the invoice

• Production downtime: Van day pulls employees off the line in batches. For shift-based operations, coordinating the schedule can cost more than the tests themselves.
• Missed shifts: Night, weekend, and rotating-shift workers are easy to miss when the van runs during business hours.
• Retest timing: OSHA allows a retest within 30 days when an annual audiogram shows a standard threshold shift (STS). If the van is gone, that retest usually means a clinic visit.
• Records you don't control: Results come back as PDFs or vendor portal exports. Pulling a five-year history for one employee can mean digging through several vendors' formats.

What clinic-based testing costs

Clinic audiograms are the most flexible option for small or scattered workforces, but usually the most expensive per test. Typical quotes are often roughly $40–$100 or more per audiogram, depending on the clinic and whether it's bundled with other occupational health services. Again, treat these as approximate and get local quotes.

The larger cost is usually time: each employee travels to the clinic, waits, tests, and travels back. For a plant 30 minutes from the nearest occupational health provider, that's easily two hours of paid time per test.

What in-house hearing testing costs

In-house testing trades a per-test fee for a set of mostly fixed costs. The main line items are:

• Tester training: OSHA accepts a technician certified by the Council for Accreditation in Occupational Hearing Conservation (CAOHC), or one who has demonstrated competence, working under the responsibility of an audiologist, otolaryngologist, or physician. The CAOHC course is roughly 20 hours; fees vary by provider and are often roughly $500–$1,000. Certification is valid for five years. See our guide to CAOHC certification.
• An audiometer that meets ANSI S3.6: This can be a traditional desktop audiometer or a digital audiometer such as an iPad audiometer.
• Calibration: OSHA Appendix E requires a functional check before each day's use, an acoustic calibration at least annually, and an exhaustive calibration at least every two years. Annual acoustic calibration typically runs a few hundred dollars, depending on the provider.
• A quiet test space: The room must meet the maximum ambient noise levels in Appendix D. That can be a prefabricated test booth (roughly $3,000–$15,000 or more, depending on size and rating) or an existing quiet room that you've measured and confirmed meets the limits.
• Professional review: An audiologist, otolaryngologist, or physician reviews problem audiograms and determines whether a referral is needed. Many programs contract this per review or per year.
• Tester time: Each annual audiogram takes a trained tester a short, predictable block of time, and it can be scheduled around production.

Where in-house testing saves money

Because most in-house costs are fixed, the per-test cost falls as headcount rises. Once the booth, audiometer, and training are paid for, each additional annual audiogram costs mainly tester time. For a site testing a few hundred employees a year, that usually beats a per-employee van fee within the first couple of years — but run the numbers with your own quotes rather than relying on rules of thumb.

Our in-house hearing testing cost calculator lets you plug in your current per-employee cost, headcount, and in-house estimates to see a break-even point.

Where in-house testing saves time and risk

• New hires get baselines fast. OSHA requires a baseline within 6 months of an employee's first exposure at or above the action level. The one-year window applies only when a mobile test van is used — and even then, employees must wear hearing protection after 6 months until the baseline is done. In-house testing lets you test new hires in their first week.
• STS retests happen on time. A retest inside the 30-day window is a scheduling task, not a vendor callback.
• Every shift gets covered. Night and weekend crews test during their own shifts.
• You own the data. Baselines, annuals, and retests live in one system instead of scattered vendor reports.

When a mobile van still makes sense

In-house testing isn't the right call for everyone. A mobile van is often the better fit when:

• You need very high volume in a single day. A van with several booths can test far more people per hour than one tester with one booth.
• You have many small, remote sites. If no single site has enough employees to justify a booth and a trained tester, a van that travels between sites can be cheaper.
• You have no quiet space. If nothing on-site can meet Appendix D without a booth, and a booth isn't in the budget, the van brings its own.
• Nobody has time to own it. In-house testing needs a named person responsible for scheduling, daily checks, calibration records, and follow-up.

Many employers run a hybrid: in-house testing at their largest sites, vans or clinics for small remote locations. That works well as long as all results land in the same system so baseline comparisons stay accurate.

A simple way to compare

1. Count your annual tests. Exposed headcount, plus expected new hires (baselines), plus expected retests.
2. Price your current model. Per-test fees, trip fees, and a realistic estimate of employee travel or downtime.
3. Price in-house. One-time costs (audiometer, booth or room work, initial CAOHC course) and recurring costs (calibration, tester time, professional review, recertification every five years).
4. Find the break-even year. Divide one-time costs by the annual savings.
5. Add the non-cash factors. Faster baselines, on-time retests, shift coverage, and data ownership.

How AudiVault fits an in-house program

AudiVault combines an iPad audiometer built to ANSI S3.6-2025 audiometer specifications with a cloud hearing conservation platform. Tests sync directly to the cloud, where each result is compared to the employee's baseline, STS is detected automatically (with OSHA age correction), and determination letters go to a physician for electronic signature — all with a full audit trail.

If you run a hybrid program, AudiVault also imports audiograms from other audiometers via CSV, so van and clinic results sit alongside your in-house tests. Related reading: how to start an in-house hearing conservation program and baseline audiogram best practices.