CAOHC EXAM UPDATED ACTUAL Questions and CORRECT Answers
-promote best practices in hearing conservation world-
What is the mission of CAOHC? wide and promote HL prevention thru training, guidance
and support
What are the professional disciplines represented on
OHC's, CD's, PS's
CAOHC?
-occupational health nurse, audiologist, noise control en-
Who are the people that work w OHC? gineer, physician, safety and health specialist, company
management
What are the elements of an effective hearing conserva- -noise monitoring, noise control, employee training, au-
tion program? diometric testing, hearing protection and recordkeeping
What does the outer ear do? collects/ funnels sound
What does the middle ear do? Convert sound waves to mechanical energy
What does the outer ear do? Converts mechanical energy to electrical energy
-otosclerosis (stapes cannot move), eustachian tube dys-
What are 2 causes of conductive HL?
function
What are three causes of sensorineural HL? -presbycusis, noise exposure, chemicals
What frequencies are affected by noise exposure? High
Whats the configuration of NIHL? noise notch at 4K
What does the eustachian tube do? Equalizes pressure in the middle ear
Hz is frequency / pitch
dB is amplitude/ loudness/ intensity
why is noise measured w an A weighted filter at work it imitates how the human ear responds to sound
time weighted average- the noise exposure averaged over
What is TWA?
an 8 hr period
every 5 dB increase you can b around the sound for half
what is the OSHA 5 dB exchange rate?
the time (85 dB for 8 hrs, 90 dB for 4)
, What are the federal regulators w a hearing conservation
policy?
-promote best practices in hearing conservation world-
What is the mission of CAOHC? wide and promote HL prevention thru training, guidance
and support
What are the professional disciplines represented on
OHC's, CD's, PS's
CAOHC?
-occupational health nurse, audiologist, noise control en-
Who are the people that work w OHC? gineer, physician, safety and health specialist, company
management
What are the elements of an effective hearing conserva- -noise monitoring, noise control, employee training, au-
tion program? diometric testing, hearing protection and recordkeeping
What does the outer ear do? collects/ funnels sound
What does the middle ear do? Convert sound waves to mechanical energy
What does the outer ear do? Converts mechanical energy to electrical energy
-otosclerosis (stapes cannot move), eustachian tube dys-
What are 2 causes of conductive HL?
function
What are three causes of sensorineural HL? -presbycusis, noise exposure, chemicals
What frequencies are affected by noise exposure? High
Whats the configuration of NIHL? noise notch at 4K
What does the eustachian tube do? Equalizes pressure in the middle ear
Hz is frequency / pitch
dB is amplitude/ loudness/ intensity
why is noise measured w an A weighted filter at work it imitates how the human ear responds to sound
time weighted average- the noise exposure averaged over
What is TWA?
an 8 hr period
every 5 dB increase you can b around the sound for half
what is the OSHA 5 dB exchange rate?
the time (85 dB for 8 hrs, 90 dB for 4)
, What are the federal regulators w a hearing conservation
policy?
