CAOHC Study Guide Questions &
Answers(RATED A+)
NIHL (Noise Induced Hearing Loss) - ANSWER 22 - 28 million US workers exposed to
harmful levels of noise. Manufacturing accounts for most .
Noise exposure - ANSWER major cause of tinnitus.
Tinnitus - ANSWER 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)? - ANSWER - 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? - ANSWER - effects job performance
- irritability
- trouble sleeping
- concentration
- increased BP & pulse.
What are the lasting effects of NIHL (noise induced hearing loss) - ANSWER 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? - ANSWER -
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? - ANSWER noise "notch"
What is CAOHC? - ANSWER Council for Accreditation in Occupational Hearing
Conservation formed in the mid 1960's.
What is CAOHC PRIMARY role? - ANSWER - provides resources/guidance/training to
OHCs (Occupational Health Conservationist)
- facilitates practice of hearing loss prevention through standardized training
- provides training to CDs and PSs.
, Hearing Conservation Amendment - ANSWER The Regulation is CFR 1910.95.
When does HCP (Hearing Conservation Plan) begin? - ANSWER - if you cannot
engineer noise out down below AL
- if exposure is 8 hr-TWA at 85dBA or greater
What are the elements of a HCP (Hearing Conservation Plan) ? - ANSWER - Noise
measurement, noise control
- audiometric monitoring,
- HPDs (Hearing Protection Devices)
- Worker training
- Recordkeeping
- Program Evaluation
dBC scale - ANSWER - more linear and
- used for determinations of NRR (Noise Reduction Rating) and
- used for determinations of community noise
What is a PS (Program Supervisor) - ANSWER - An Audiologist/Physician
- supervises audio monitoring of HCP (Hearing Conservation Program)
- can also be the HCP Mgr but does not have to be
15. State and local requirements - ANSWER must MEET or EXCEED federal standards
OHC/Employers - ANSWER must follow MOST federal standards
DoD - ANSWER - different than OSHA-
- more proactive;
- 3 dB Exchange Rate
- lower PEL.
- ANSWER State and local requirements must MEET or EXCEED federal standards.
OHC/Employers must follow MOST
DOD different than OSHA- more proactive; 3 dB Exchange Rate, lower PEL.
23. - ANSWER You have 6 months to establish a baseline but if you use a mobile
service, you have ONE YEAR to establish the baseline!
18. - ANSWER PEL - 90 dBA 8 hour TWA- above that needs HP; Action Level:-85dBA
or greater 8 hour TWA -requires employer to start HCP and make HPDs available.
Exchange Rate - 5db US; 3dB Europe and some professional groups.
Physics of Sound/Anatomy: - ANSWER
Answers(RATED A+)
NIHL (Noise Induced Hearing Loss) - ANSWER 22 - 28 million US workers exposed to
harmful levels of noise. Manufacturing accounts for most .
Noise exposure - ANSWER major cause of tinnitus.
Tinnitus - ANSWER 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)? - ANSWER - 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? - ANSWER - effects job performance
- irritability
- trouble sleeping
- concentration
- increased BP & pulse.
What are the lasting effects of NIHL (noise induced hearing loss) - ANSWER 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? - ANSWER -
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? - ANSWER noise "notch"
What is CAOHC? - ANSWER Council for Accreditation in Occupational Hearing
Conservation formed in the mid 1960's.
What is CAOHC PRIMARY role? - ANSWER - provides resources/guidance/training to
OHCs (Occupational Health Conservationist)
- facilitates practice of hearing loss prevention through standardized training
- provides training to CDs and PSs.
, Hearing Conservation Amendment - ANSWER The Regulation is CFR 1910.95.
When does HCP (Hearing Conservation Plan) begin? - ANSWER - if you cannot
engineer noise out down below AL
- if exposure is 8 hr-TWA at 85dBA or greater
What are the elements of a HCP (Hearing Conservation Plan) ? - ANSWER - Noise
measurement, noise control
- audiometric monitoring,
- HPDs (Hearing Protection Devices)
- Worker training
- Recordkeeping
- Program Evaluation
dBC scale - ANSWER - more linear and
- used for determinations of NRR (Noise Reduction Rating) and
- used for determinations of community noise
What is a PS (Program Supervisor) - ANSWER - An Audiologist/Physician
- supervises audio monitoring of HCP (Hearing Conservation Program)
- can also be the HCP Mgr but does not have to be
15. State and local requirements - ANSWER must MEET or EXCEED federal standards
OHC/Employers - ANSWER must follow MOST federal standards
DoD - ANSWER - different than OSHA-
- more proactive;
- 3 dB Exchange Rate
- lower PEL.
- ANSWER State and local requirements must MEET or EXCEED federal standards.
OHC/Employers must follow MOST
DOD different than OSHA- more proactive; 3 dB Exchange Rate, lower PEL.
23. - ANSWER You have 6 months to establish a baseline but if you use a mobile
service, you have ONE YEAR to establish the baseline!
18. - ANSWER PEL - 90 dBA 8 hour TWA- above that needs HP; Action Level:-85dBA
or greater 8 hour TWA -requires employer to start HCP and make HPDs available.
Exchange Rate - 5db US; 3dB Europe and some professional groups.
Physics of Sound/Anatomy: - ANSWER
