CAOHC Exam Study Review exam fully solved &
updated 2025-2026(latest version verified for
accuracy)
Unit of measurement for frequency (pitch) - answer--Hertz (Hz)
Unit of measurement for intensity (loudness) - answer--Decibel (dB)
Risk of damage from noise - answer--How loud (intensity) and how long
(duration)
Steady-state or continuous noise, e.g. generator - answer--Lasts 1
second or longer
Impulse or Impact noise, e.g. gunfire or nail gun - answer--Lasts less
than one second
Parts of the outer ear - answer--Pinna and external auditory canal
Parts of the middle ear - answer--Tympanic membrane, ossicles,
eustachian tube
, Eustachian tube (auditory tube) - answer--Tube connecting the middle
ear to the pharynx and equalizes middle ear space with atmospheric
pressure
Conductive HL occurs here - answer--Outer or middle ear
Sensorineural hearing loss - answer--Hearing loss resulting from
damage to the inner ear (cochlea) or the auditory nerve
Noise-induced hearing loss (NIHL) - answer--Condition caused by the
destruction of hair cells in the inner ear, the organs responsible for
hearing, as a result of sounds that are "too long, too loud, or too close";
a sensorineural hearing loss
Mixed hearing loss - answer--Combination of conductive and
sensorineural types in the same ear
Middle ear bones (ossicles) - answer--Malleus (hammer), incus (anvil),
stapes (stirrup)
Possible early symptoms/signs of noise induced hearing loss - answer--
Tinnitus; difficulty understanding in presence of background noise; read
visual cues
updated 2025-2026(latest version verified for
accuracy)
Unit of measurement for frequency (pitch) - answer--Hertz (Hz)
Unit of measurement for intensity (loudness) - answer--Decibel (dB)
Risk of damage from noise - answer--How loud (intensity) and how long
(duration)
Steady-state or continuous noise, e.g. generator - answer--Lasts 1
second or longer
Impulse or Impact noise, e.g. gunfire or nail gun - answer--Lasts less
than one second
Parts of the outer ear - answer--Pinna and external auditory canal
Parts of the middle ear - answer--Tympanic membrane, ossicles,
eustachian tube
, Eustachian tube (auditory tube) - answer--Tube connecting the middle
ear to the pharynx and equalizes middle ear space with atmospheric
pressure
Conductive HL occurs here - answer--Outer or middle ear
Sensorineural hearing loss - answer--Hearing loss resulting from
damage to the inner ear (cochlea) or the auditory nerve
Noise-induced hearing loss (NIHL) - answer--Condition caused by the
destruction of hair cells in the inner ear, the organs responsible for
hearing, as a result of sounds that are "too long, too loud, or too close";
a sensorineural hearing loss
Mixed hearing loss - answer--Combination of conductive and
sensorineural types in the same ear
Middle ear bones (ossicles) - answer--Malleus (hammer), incus (anvil),
stapes (stirrup)
Possible early symptoms/signs of noise induced hearing loss - answer--
Tinnitus; difficulty understanding in presence of background noise; read
visual cues
