DOT Physical Hearing Requirements: Whisper Test, Hearing Aids & Exemptions

This article is for general information only and is not medical advice. If you have hearing loss, talk to your doctor or an audiologist before your DOT physical.

What Are the DOT Physical Hearing Requirements?

• Only one ear has to pass. The regulation measures hearing "in the better ear." FMCSA's Handbook adds that both ears are tested, but only your better ear has to meet the standard.
• Hearing aids and cochlear implants are allowed. You can be qualified as long as you meet the standard while using them.
• Two ways to pass: the forced whisper test at 5 feet, or an audiometric test averaging 40 dB or better in one ear.
• No hearing-specific shorter card. The federal rules don't set a shorter maximum certificate for hearing aid users; the general 24-month maximum applies, though an examiner can certify you for less.
• Not qualified under the standard: failing both the whisper test and the audiometric test in your better ear, even with hearing aids. Your path then is a federal hearing exemption, which only FMCSA can grant.

DOT Hearing Test Chart

Source: 49 CFR 391.41(b)(11); FMCSA Medical Examiner's Handbook, 2024 Edition, sections 1.7 and 4.5

The Federal Hearing Standard: 49 CFR 391.41(b)(11)

The hearing rule is one of the 13 physical qualification standards in 49 CFR 391.41(b). It is federal regulation, and FMCSA's Handbook says that, subject to limited exceptions, interstate commercial motor vehicle drivers must comply with these physical qualification standards. Here is the full text. A person is physically qualified to drive a commercial motor vehicle if that person:

In plain terms, there are two ways to meet the standard, and you only need one of them:

• Whisper test: you hear a forced whisper in your better ear at a distance of at least 5 feet.
• Audiometric test: your better ear's average hearing loss across 500, 1,000 and 2,000 Hz is no greater than 40 decibels.

The rest of what you'll read about how the test is given comes from FMCSA's Medical Examiner's Handbook. The Handbook is guidance, not law. FMCSA says its recommendations "do not have the force and effect of law," and that when the Handbook uses words like "should" or "may," they are recommendations. The examiner makes the final call on whether you meet the standard.

The Forced Whisper Test: What Happens in the Exam Room

FMCSA's Handbook describes how examiners should give the whispered voice test:

The Audiometric (Audiogram) Test and the 40 dB Rule

An audiometric test measures how much hearing loss you have at specific pitches, in decibels (dB). For the DOT standard, only three frequencies count: 500 Hz, 1,000 Hz and 2,000 Hz. FMCSA's Handbook describes these as frequencies typical of normal conversation.

Here is how the Handbook says the result is figured:

• Record each ear separately at 500, 1,000 and 2,000 Hz, using the ANSI standard.
• Average each ear by adding the three results and dividing by 3.
• Don't round. The Handbook says the averaged result should not be rounded when deciding whether you meet the standard.
• To pass, one ear must average 40 dB or less, with or without a hearing aid or cochlear implant.

A note on ISO vs. ANSI audiograms

The federal standard is written around the ANSI calibration. FMCSA's Medical Advisory Criteria note that some audiograms are reported on the ISO standard, and that it may be necessary to convert them. The conversion the criteria give is: subtract 14 dB from the ISO result at 500 Hz, 10 dB at 1,000 Hz, and 8.5 dB at 2,000 Hz, then average the three. If your audiologist's report uses the ISO scale, ask your audiologist or examiner whether the results have been converted.

If an audiologist does your test

The Handbook says the audiologist should put their name, phone number, email address, license number and licensing state on the report, and date and sign it. The examiner records the results on your Medical Examination Report Form (MCSA-5875) and attaches the audiology report.

Can You Pass With Hearing Loss in One Ear?

Yes, as long as your other ear meets the standard. The regulation measures hearing "in the better ear," and FMCSA's Handbook says it plainly: although both ears must be tested, only the better ear has to meet the standard.

So a driver who is deaf in one ear can still pass if the other ear hears the forced whisper at 5 feet, or averages 40 dB or less on an audiometer.

Hearing Aids and Cochlear Implants

Using a hearing aid doesn't disqualify you. The standard itself says "with or without the use of a hearing aid," and FMCSA's Handbook says a driver with a hearing aid or cochlear implant can be physically qualified as long as they can meet the hearing standard.

Wear your hearing aids to the exam if you use them. The Handbook says it's the examiner's responsibility to decide whether you can meet the standard with your hearing aids, either by giving the whisper test while you wear them or by asking for an audiometric test done by an audiologist while you wear them.

What Happens If You Fail the DOT Hearing Test

Failing the screening at your exam isn't necessarily the end of the road. FMCSA's Handbook lays out these options:

If you disagree with an examiner's decision, the Handbook says the rules don't prohibit you from getting a second exam from another certified medical examiner. You're expected to give both examiners the same medical information.

The Federal Hearing Exemption

FMCSA's Handbook says the agency started issuing hearing exemptions in 2013 and continues to do so on a case-by-case basis. A driver who meets the other physical qualification standards but does not meet the hearing standard may apply.

What the medical examiner does (and doesn't do)

• The examiner can't grant the exemption. The Handbook says medical examiners cannot issue exemptions. Only FMCSA can.
• The examiner checks everything else. The examiner should complete the exam and decide whether you meet the other physical standards.
• Your certificate is marked. The examiner writes "hearing" in the waiver/exemption box on your MCSA-5875 and MCSA-5876. The examiner must not check both "Wearing hearing aid" and the hearing exemption box.
• The certificate isn't valid on its own. When a certificate says a medical exemption is required, FMCSA's Handbook says it is not valid unless you apply for and are issued the exemption.

What FMCSA asks new applicants to send

FMCSA's new-applicant letter for the hearing exemption (last updated July 8, 2024) requests:

1. An applicant statement with your full name, mailing address, date of birth, phone number, email address, the type of vehicle you will drive (including gross vehicle weight), and confirmation that you drive, or intend to drive, in interstate commerce
2. A legible copy of your driver's license, front and back
3. A completed and signed Authorization for Release of Medical Information form
4. A legible copy of your driving record for the last 3 years, dated within 3 months of your application, plus official documentation of any crash or moving-violation conviction
5. A legible copy of your Medical Examiner's Certificate (MCSA-5876) showing that a hearing exemption is required

FMCSA says to send the package by one method only: email, mail or fax. The email address is [email protected]. Download the current application from FMCSA's driver exemptions page.

If FMCSA grants your exemption

• Carry your hearing exemption. Federal rules require a driver who qualifies through an FMCSA medical variance, such as an exemption letter, to have a copy of that documentation on them when on duty. For CDL and CLP holders, the rule says the original or a copy must be in their possession at all times when on duty.
• The medical certificate is different. On or after June 23, 2025, a CDL or CLP holder with a current medical certificate no longer needs to carry the certificate itself. Drivers who aren't covered by that CDL/CLP exception must still have the original or a copy of their current certificate with them when on duty.
• Your carrier checks both. The Handbook says the employing motor carrier is responsible for making sure you have a current hearing exemption and a current medical certificate before you drive. Keep both current.

Note: FMCSA's 2024 Handbook still tells drivers to carry both the exemption and the medical certificate. The federal regulation on carrying the certificate was updated afterward, and where the two differ, the regulation controls.

How the decision gets made

FMCSA's application letter says the agency must find that an exemption would keep a level of safety equal to, or greater than, the level without it. Each application is published in a Federal Register notice with a 30-day public comment period, and FMCSA must consider those comments before deciding. FMCSA's exemptions page says the agency will make a final decision within 180 days of receiving a completed application. You'll be notified of the decision in writing.

To request an application, FMCSA's Handbook lists (202) 366-4001 and the hearing exemption email address above.

How Long Is a DOT Medical Card With Hearing Aids?

The federal rules don't set a shorter maximum for drivers who use hearing aids. FMCSA's Handbook says 49 CFR 391.45 provides the only circumstances that require an examiner to certify a driver for less than the maximum 24 months, and hearing isn't one of them. Insulin-treated diabetes and the alternative vision standard, for example, are capped at 12 months.

For drivers who need a hearing exemption, the Handbook says examiners may physically qualify them for the maximum 24-month certification period. FMCSA also says it grants medical exemptions involving the physical standards for up to 24 months, to line up with the maximum length of medical certification.

Keep in mind these are maximums. The Handbook says an examiner may certify you for a shorter period if they want to monitor you more often, and your overall certification still depends on every other DOT standard, including blood pressure and vision.

Intrastate Drivers: Different Rules May Apply

Everything above covers interstate drivers under the federal rules. According to FMCSA's Handbook, states regulate intrastate commercial drivers who aren't subject to the federal physical qualification rules. Nearly all states have adopted the federal standards for intrastate drivers, but some have additional, different or stricter requirements.

FMCSA cannot issue medical variances to intrastate drivers, and its exemptions page says federal hearing exemptions don't provide relief for drivers who plan to drive only within one state. The Handbook notes that some states issue their own waivers. If you drive only within your state, check with your state's licensing agency.

How to Prepare for Your DOT Hearing Test

None of these steps are federal requirements. They're practical ways to avoid surprises on exam day.

• If you wear hearing aids, wear them to the exam. FMCSA's Handbook says drivers who qualify with hearing aids should be encouraged to have a spare power source for them when driving, but you don't have to show one at the exam
• If you've had a recent audiogram, bring a copy of the signed report
• If you've noticed your hearing slipping, consider seeing an audiologist before your exam rather than after
• Be honest about your hearing history on the health questionnaire
• If you think you may need an exemption, start gathering your 3-year driving record and other documents early, since FMCSA's decision can take up to 180 days

Frequently Asked Questions

Sources

1. 49 CFR 391.41(b)(11) — Physical qualifications for drivers (hearing)
2. 49 CFR 391.45 — Persons who must be medically examined and certified
3. FMCSA Medical Examiner's Handbook, 2024 Edition (sections 1.3, 1.7, 2.1.1, 2.2, 3.2, 4.2, 4.5, 6.2.1.1.2, 7.1.1)
4. FMCSA — Driver Exemptions
5. FMCSA — Federal Hearing Exemption Application (New)