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CAOHC EXAM STUDY ACTUAL
2025/2026 QUESTIONS AND 100%
CORRECT ANSWERS
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
, 2
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
Auditory effects of noise - (ANSWER)NIHL; tinnitus; hyperacusis
Non-auditory effects of noise - (ANSWER)annoyance
sleep disturbance
CAOHC EXAM STUDY ACTUAL
2025/2026 QUESTIONS AND 100%
CORRECT ANSWERS
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
, 2
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
Auditory effects of noise - (ANSWER)NIHL; tinnitus; hyperacusis
Non-auditory effects of noise - (ANSWER)annoyance
sleep disturbance
