FMCSA Course - 04 Hearing Module
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What regulation is used as the standard for hearing?
49 CFR 391.41(b) (11)
A person is physically qualified to drive a Commercial Motor Vehicle (CMV) if that person:
1. First perceives a forced whispered voice in the better ear at not less than ___ feet with or without the use of a hearing aid, or
2. If tested by use of an audiometric device, does not have an average hearing loss in the better ear greater than ___ decibels at ___ Hz, ___ Hz, and ___ Hz with or without a hearing aid when the audiometric device is calibrated to American National Standard (formerly ADA Standard).
- 1. 5 feet
- 2. 40 dB at 500, 1000, 2000 Hz
OSHA audiometric testing is at (a) _____, _____, and _____ Hz.
(b) What is OSHA’s objective in testing at these ranges?
- (a) 2000, 3000, 4000 Hz
- (b) To determine if exposure to loud noise has damaged a worker’s hearing.
To convert audiometric results from International Organization for Standardization (ISO) to ANSI:
Subtract (a) __ dB from ISO for 500 Hz.
Subtract (b) __ dB from ISO for 1,000 Hz.
Subtract (c) __ dB from ISO for 2,000 Hz.
- (a) 14 dB
- (b) 10 dB
- (c) 8.5 dB
(True or False) A driver wearing hearing aids can be tested using using in-office audiometric devices.
Drivers are usually sent to an audiologist or hearing aid centers for testing with appropriate devices. Audiometers at non-specialty practices are not designed for testing people wearing hearing aids.
FMCA's hearing exemption for a driver who meets the hearing requirements in one ear is valid for how long?
*with annual recertification
What is the major concern in evaluating a driver with cochlear implants for certification?
* no certification if symptomatic; ensure symptom-free period when certifying
Vertigo and dizziness, even if periodic or in the early stages, warrant the decision to not certify the driver when symptoms interfere with one or more of what 5 functions?
- 1. Cognitive abilities
- 2. Attention
- 3. Concentration
- 4. Judgement
- 5. Sensory & motor function
How long of a symptom-free waiting period is recommended for a driver with a diagnosis of acute or chronic peripheral vestibulopathy and benign positional vertigo?
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