CAOHC Exam Questions with Answers Latest Update | CAOHC EXAM
QUESTIONS WITH CORRECT ANSWERS LATEST UPDATED | CAOHC
Exam Study Guide – Questions With 100% Correct Answers & CAOHC
Final Exam Prep Questions with 100% correct Answers Latest Updated
Unit of measurement for Hertz (Hz)
frequency (pitch)
Unit of measurement for Decibel (dB)
intensity (loudness)
Risk of damage from noise How loud (intensity) and how long (duration)
Steady-state or continuous Lasts 1 second or longer
noise, e.g. generator
Impulse or Impact noise, Lasts less than one second
e.g. gunfire or nail gun
Parts of the outer ear Pinna and external auditory canal
Parts of the middle ear Tympanic membrane, ossicles, eustachian tube
Tube connecting the middle ear to the pharynx
Eustachian tube (auditory
tube) and equalizes middle ear space with atmospheric
pressure
Conductive HL occurs Outer or middle ear
here
Sensorineural hearing loss Hearing loss resulting from damage to the inner ear
(cochlea) or the auditory nerve
Condition caused by the destruction of hair cells,
Noise-induced hearing the organs responsible for hearing, as a result of
loss (NIHL)
sounds that are "too long, too loud, or too
close"; a sensorineural
hearing loss
Mixed hearing loss Combination of conductive and sensorineural types in
the same ear
Middle ear bones Malleus (hammer), incus (anvil), stapes (stirrup)
(ossicles)
Possible early Tinnitus; difficulty understanding in presence of
symptoms/signs of noise background noise; read visual cues
induced hearing loss
Auditory effects of noise NIHL; tinnitus; hyperacusis
, annoyance
sleep
disturbanc
Non-auditory effects of e attention
noise motivation
stress reactions
cardiovascular
problems
endocrine
problems
Good rule of thumb to recognize hazardous noise
exposure levels/situations: the
3 foot rule rule is: if you have to shout at arms length (~3ft),
in order to be understood over the background
noise, then you're likely exposed to hazardous
noise levels & should be wearing hearing
protection to prevent NIHL
OSHA (Occupational OSHA enforces regulation and NIOSH
Safety and Health recommends best practice based on science and
Administration) versus research
National institute of
Occupational Safety and
Heath (NIOSH)
SPL describes noise measurements taken with a
Sound pressure level
sound level meter or dosimeter; HL describes
(SPL) versus hearing
Threshold levels obtained with an audiometer; 0
level (HL)
dB HL is not equal to 0 dB SPL
A sound measurement device used to record the
amount of sound exposure over an extended
Noise Dosimeter
period of
time (usually a
work day)
Personal vs. Area
Uses a microphone to sense pressure variations in
Sound level meter sound waves; the meter converts those pressures
directly into decibels; provides a noise
measurement that is a
snapshot in time.
QUESTIONS WITH CORRECT ANSWERS LATEST UPDATED | CAOHC
Exam Study Guide – Questions With 100% Correct Answers & CAOHC
Final Exam Prep Questions with 100% correct Answers Latest Updated
Unit of measurement for Hertz (Hz)
frequency (pitch)
Unit of measurement for Decibel (dB)
intensity (loudness)
Risk of damage from noise How loud (intensity) and how long (duration)
Steady-state or continuous Lasts 1 second or longer
noise, e.g. generator
Impulse or Impact noise, Lasts less than one second
e.g. gunfire or nail gun
Parts of the outer ear Pinna and external auditory canal
Parts of the middle ear Tympanic membrane, ossicles, eustachian tube
Tube connecting the middle ear to the pharynx
Eustachian tube (auditory
tube) and equalizes middle ear space with atmospheric
pressure
Conductive HL occurs Outer or middle ear
here
Sensorineural hearing loss Hearing loss resulting from damage to the inner ear
(cochlea) or the auditory nerve
Condition caused by the destruction of hair cells,
Noise-induced hearing the organs responsible for hearing, as a result of
loss (NIHL)
sounds that are "too long, too loud, or too
close"; a sensorineural
hearing loss
Mixed hearing loss Combination of conductive and sensorineural types in
the same ear
Middle ear bones Malleus (hammer), incus (anvil), stapes (stirrup)
(ossicles)
Possible early Tinnitus; difficulty understanding in presence of
symptoms/signs of noise background noise; read visual cues
induced hearing loss
Auditory effects of noise NIHL; tinnitus; hyperacusis
, annoyance
sleep
disturbanc
Non-auditory effects of e attention
noise motivation
stress reactions
cardiovascular
problems
endocrine
problems
Good rule of thumb to recognize hazardous noise
exposure levels/situations: the
3 foot rule rule is: if you have to shout at arms length (~3ft),
in order to be understood over the background
noise, then you're likely exposed to hazardous
noise levels & should be wearing hearing
protection to prevent NIHL
OSHA (Occupational OSHA enforces regulation and NIOSH
Safety and Health recommends best practice based on science and
Administration) versus research
National institute of
Occupational Safety and
Heath (NIOSH)
SPL describes noise measurements taken with a
Sound pressure level
sound level meter or dosimeter; HL describes
(SPL) versus hearing
Threshold levels obtained with an audiometer; 0
level (HL)
dB HL is not equal to 0 dB SPL
A sound measurement device used to record the
amount of sound exposure over an extended
Noise Dosimeter
period of
time (usually a
work day)
Personal vs. Area
Uses a microphone to sense pressure variations in
Sound level meter sound waves; the meter converts those pressures
directly into decibels; provides a noise
measurement that is a
snapshot in time.
