Hearing: A Failed Whisper Test, a Functioning Hearing Aid, and an Audiogram That Says Something Else
TP is a 49-year-old driver presenting for recertification. With the door closed and the room quiet, you perform a forced whisper test at 5 feet: in the right ear he repeats all three letter-number combinations correctly; in the left ear he misses two of three. With his behind-the-ear hearing aid in the right ear he repeats all three at 5 feet. He has worn the aid for six years, wears it all day, and removes it only to sleep and shower. Otoscopy is normal, with no drainage or vertigo. An audiogram from four weeks ago, performed at a local clinic with calibrated equipment, reports average hearing thresholds at 500, 1000, and 2000 Hz of 48 dB in the right ear unaided and 36 dB in the left ear. He has no other disqualifying findings.
1. Is he qualified? Explain how the two testing pathways interact and how you resolve the conflicting results.
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He is qualified, and the audiometric pathway is what gets him there.
- 49 CFR 391.41(b)(11) provides two alternative ways to meet the hearing standard: perceive a forced whispered voice in the better ear at not less than 5 feet, with or without a hearing aid, or have an average hearing loss in the better ear no greater than 40 dB at 500, 1000, and 2000 Hz, with or without a hearing aid. Either pathway satisfies the standard.
- His better ear by audiometry is the left at 36 dB average, which meets the audiometric criterion unaided. The whisper failure on the left is discordant with that result and needs to be explained before you rely on either test: check that the room was quiet, that the untested ear was properly masked, that the whisper was voiced after full exhalation, and consider fatigue or attention.
- Before using the outside audiogram, confirm it came from calibrated equipment with a valid, dated report and identifies which ear was tested. If it is technically sound, rely on it and document that the audiometric pathway was used; if not, arrange testing in your office and decide on that basis.
- Do not average the two pathways or split the difference - one qualifying pathway is sufficient.
2. How do you record the outcome on the certificate and examination report, and what do you tell the driver about the hearing aid?
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Record the pathway you actually used.
- Because he qualifies by audiometry unaided, the certificate does not need to carry a hearing-aid requirement. Document the thresholds, the date and source of the audiogram, and the whisper test results with a note reconciling the discrepancy.
- If you had instead qualified him on the aided whisper test, the certificate should record that he meets the standard with a hearing aid, so that the carrier and, if necessary, enforcement know the device is part of how he qualifies. Functionally he should not drive without it.
- When the aided whisper is the qualifying basis, tell the driver clearly that the device is part of his qualification, that he needs a working spare or a plan if it fails, and that driving without it puts him outside the terms of his certification. That conversation belongs in the record.
- Either way, note the discrepancy and your reasoning, so a reviewer or a future examiner can see why you concluded as you did.
3. Six months later he returns saying the hearing aid is broken and he cannot afford a replacement. He wants a new card "without the hearing aid note." What is your position?
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Re-test; do not simply edit the certificate.
- The question is not what the card says but what his hearing is today. Repeat the examination: forced whisper at 5 feet in the better ear, or a current audiogram. If his unaided hearing meets either pathway, he qualifies without any hearing-aid notation and the card can be issued on that basis.
- If he now meets the standard only with amplification and he has no functioning aid, he does not meet the hearing standard at this examination. A certificate cannot be issued on the assumption that he will obtain a device later.
- If the unaided audiogram is borderline - for example, an average just over 40 dB in the better ear - resist the temptation to round down or to accept a test that was not properly performed. Order a technically adequate test and decide on it.
- Document the change in circumstance. Removing a hearing-aid requirement from a certificate at the driver's request, without new testing that supports it, is falsification of the certification decision.