CAOHC Exam Study UPDATED Study Guide QUESTIONS AND CORRECT ANSWERS

CAOHC Exam Study UPDATED Study
Guide QUESTIONS AND CORRECT
ANSWERS
- Unit of measurement for frequency (pitch) - CORRECT ANSWERS
Hertz (Hz)


Unit of measurement for intensity (loudness) - CORRECT
ANSWERS Decibel (dB)


Risk of damage from noise - CORRECT ANSWERS How
loud (intensity) and how long (duration)


Steady-state or continuous noise, e.g. generator - CORRECT
ANSWERS Lasts 1 second or longer


Impulse or Impact noise, e.g. gunfire or nail gun - CORRECT
ANSWERS Lasts less than one second


Parts of the outer ear - CORRECT ANSWERS Pinna and
external auditory canal


Parts of the middle ear - CORRECT ANSWERS Tympanic
membrane, ossicles, eustachian tube

, Eustachian tube (auditory tube) - CORRECT ANSWERS
Tube connecting the middle ear to the pharynx and equalizes middle
ear space with atmospheric pressure


Conductive HL occurs here - CORRECT ANSWERS Outer or
middle ear


Sensorineural hearing loss - CORRECT ANSWERS Hearing
loss resulting from damage to the inner ear (cochlea) or the auditory
nerve


Noise-induced hearing loss (NIHL) - CORRECT ANSWERS
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 - CORRECT ANSWERS Combination of
conductive and sensorineural types in the same ear


Middle ear bones (ossicles) - CORRECT ANSWERS Malleus
(hammer), incus (anvil), stapes (stirrup)


Possible early symptoms/signs of noise induced hearing loss -
CORRECT ANSWERS Tinnitus; difficulty understanding in
presence of background noise; read visual cues


Auditory effects of noise - CORRECT ANSWERS NIHL;
tinnitus; hyperacusis