CAOHC Study Guide with Questions and
Correct Answers
NIHL (Noise Induced Hearing Loss) - ✔✔22 - 28 million US workers exposed to harmful
levels of noise. Manufacturing accounts for most .
Noise exposure - ✔✔major cause of tinnitus.
Tinnitus - ✔✔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)? - ✔✔- 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? - ✔✔- effects job performance
- irritability
- trouble sleeping
- concentration
- increased BP & pulse.
What are the lasting effects of NIHL (noise induced hearing loss) - ✔✔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? - ✔✔- 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? - ✔✔noise "notch"
What is CAOHC? - ✔✔Council for Accreditation in Occupational Hearing Conservation
formed in the mid 1960's.
What is CAOHC PRIMARY role? - ✔✔- 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? - ✔✔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 - ✔✔-can do audiometric pure tone air conduction only
Role of Audiologist - ✔✔
Role of Nurse - ✔✔
Correct Answers
NIHL (Noise Induced Hearing Loss) - ✔✔22 - 28 million US workers exposed to harmful
levels of noise. Manufacturing accounts for most .
Noise exposure - ✔✔major cause of tinnitus.
Tinnitus - ✔✔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)? - ✔✔- 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? - ✔✔- effects job performance
- irritability
- trouble sleeping
- concentration
- increased BP & pulse.
What are the lasting effects of NIHL (noise induced hearing loss) - ✔✔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? - ✔✔- 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? - ✔✔noise "notch"
What is CAOHC? - ✔✔Council for Accreditation in Occupational Hearing Conservation
formed in the mid 1960's.
What is CAOHC PRIMARY role? - ✔✔- 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? - ✔✔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 - ✔✔-can do audiometric pure tone air conduction only
Role of Audiologist - ✔✔
Role of Nurse - ✔✔
