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CAOHC EXAM STUDY GUIDE
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CAOHC EXAM STUDY GUIDE
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CAOHC EXAM STUDY GUIDENIHL (Noise Induced Hearing Loss) - Answers- 22 - 28 million US workers exposed to
harmful levels of noise. Manufacturing accounts for most .
Noise exposure - Answers- major cause of tinnitus.
Tinnitus - Answers- is usually a high pitched sound that person hears, others usually
cannot hear. Major warning sign of NIHL.
What are the auditory effects of noise (NIHL)? - Answers- - hearing loss, high freq,
usually bilateral, 1st seen at 3kHz-6kHz
- tinnitus
- communication interference, backgound noise in loud room, causes difficulty hearing
- damage to Inner Ear/COCHLEA, permanent and progressive.
What are the non-auditory effects of noise? - Answers- - effects job performance
- irritability
- trouble sleeping
- concentration
- increased BP & pulse.
What are the lasting effects of NIHL (noise induced hearing loss) - Answers- Lasting
effects of NIHL: High frequency hrg loss/damage to the Inner Ear- Cochlea. Usually has
tinnitus, has difficulty understanding speech especially in noisy situations, social
withdrawal, depression, effect on private life.
At which level(s) does NIHL (noise induced hearing loss) first appear? - Answers- -
appears somewhere between 3kHz and 6kHz
- you see a Noise "notch" on the audiogram and with further exposure
- the notch deepens and widens because it progresses.
What is seen on an audiogram between 3kHz and 6kHz that gets deeper and wider as it
progresses due to further exposure? - Answers- noise "notch"
What is CAOHC? - Answers- Council for Accreditation in Occupational Hearing
Conservation formed in the mid 1960's.
What is CAOHC PRIMARY role? - Answers- - provides resources/guidance/training to
OHCs (Occupational Health Conservationist)
- facilitates practice of hearing loss prevention through standardized training
- provides training to CDs and PSs.
Which organizations or disciplines are on the CAOHC council? - Answers- CAOHC
consists of 2 Reps from each organization;
, -There are 9 organizations:
1. American Academy of Otolarygology-Head and Neck Surgery
2. American Academy of Audiology;
3. American Association of OHNs;
4. American Coll. of Occupational and Environmental Medicine;
5. American Industrial Hygiene;
6. American Society of Safety Engineers;
7. American Speech-Language-Hearing Association;
8. Institute of Noise Control Engineering;
9. Military Audiology Association
Role of OHC - Answers- -can do audiometric pure tone air conduction only
Role of Audiologist - Answers-
Role of Nurse - Answers-
Role of Physician/Audologist - Answers- - serves as PS
- must supervise audio monitoring of HCP
- can also be the HCP Mgr but does not have to be
Role of Safety Engineer - Answers-
Role of IH (Industrial Hearing) - Answers-
Role of Management - Answers-
What is the Hearing Conservation Law/Amendment - Answers- The Regulation is CFR
1910.95.
NIOSH (National Institute of Safety and Health) - Answers- - determines BEST
PRACTICE with no consideration to cost
OSHA (Occupational Safety and Health Administration) - Answers- - writes regulations
- enforces & issues citation
- considers economic impact to companies
OHC (Occupational Health Conservationist) - Answers- - must follow the most
STRINGENT standard of the Hearing Conservation Law
- According to OSHA, takes care of RECORDKEEPING
What is PEL? - Answers- - any sound above 90 dBA 8 hour TWA
- needs HP (Hearing Protection)
What is the Action Level? - Answers- - 85dBA or greater 8 hour TWA
- requires employer to start HCP and make HPDs available.
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