CAOHC EXAM QUESTIONS & ANSWERS
(RATED A)
What is the mission of CAOHC? - ANSWER -promote best practices in hearing
conservation worldwide and promote HL prevention thru training, guidance and support
What are the professional disciplines represented on CAOHC? - ANSWER OHC's,
CD's, PS's
Who are the people that work w OHC? - ANSWER -occupational health nurse,
audiologist, noise control engineer, physician, safety and health specialist, company
management
What are the elements of an effective hearing conservation program? - ANSWER -noise
monitoring, noise control, employee training, audiometric testing, hearing protection and
recordkeeping
What does the outer ear do? - ANSWER collects/ funnels sound
What does the middle ear do? - ANSWER Convert sound waves to mechanical energy
What does the outer ear do? - ANSWER Converts mechanical energy to electrical
energy
What are 2 causes of conductive HL? - ANSWER -otosclerosis (stapes cannot move),
eustachian tube dysfunction
What are three causes of sensorineural HL? - ANSWER -presbycusis, noise exposure,
chemicals
What frequencies are affected by noise exposure? - ANSWER High
Whats the configuration of NIHL? - ANSWER noise notch at 4K
What does the eustachian tube do? - ANSWER Equalizes pressure in the middle ear
Hz is - ANSWER frequency / pitch
dB is - ANSWER amplitude/ loudness/ intensity
why is noise measured w an A weighted filter at work - ANSWER it imitates how the
human ear responds to sound
(RATED A)
What is the mission of CAOHC? - ANSWER -promote best practices in hearing
conservation worldwide and promote HL prevention thru training, guidance and support
What are the professional disciplines represented on CAOHC? - ANSWER OHC's,
CD's, PS's
Who are the people that work w OHC? - ANSWER -occupational health nurse,
audiologist, noise control engineer, physician, safety and health specialist, company
management
What are the elements of an effective hearing conservation program? - ANSWER -noise
monitoring, noise control, employee training, audiometric testing, hearing protection and
recordkeeping
What does the outer ear do? - ANSWER collects/ funnels sound
What does the middle ear do? - ANSWER Convert sound waves to mechanical energy
What does the outer ear do? - ANSWER Converts mechanical energy to electrical
energy
What are 2 causes of conductive HL? - ANSWER -otosclerosis (stapes cannot move),
eustachian tube dysfunction
What are three causes of sensorineural HL? - ANSWER -presbycusis, noise exposure,
chemicals
What frequencies are affected by noise exposure? - ANSWER High
Whats the configuration of NIHL? - ANSWER noise notch at 4K
What does the eustachian tube do? - ANSWER Equalizes pressure in the middle ear
Hz is - ANSWER frequency / pitch
dB is - ANSWER amplitude/ loudness/ intensity
why is noise measured w an A weighted filter at work - ANSWER it imitates how the
human ear responds to sound
