What are the hearing requirements and how do they differ from the vision requirements?
As per FMCSA 391.41 (b) (11):
“A person is physically qualified to drive a commercial motor vehicle if that person —
First perceives a forced whispered voice in the better ear at not less than 5 feet with or without the use of a hearing aid or, if tested by use of an audiometric device, does not have an average hearing loss in the better ear greater than 40 decibels at 500 Hz, 1,000 Hz, and 2,000 Hz with or without a hearing aid when the audiometric device is calibrated to American National Standard (formerly ASA Standard) Z24.5–1951.”
In reviewing the hearing standard above notice that it says “better ear”. So the driver is required to meet the standard in one ear not both. That differs from the vision standard where monocular vision is disqualifying…
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