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CAOHC Exam Study 2023 /Questions And Answers 100% Score!!!
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CAOHC Exam Study 2023 /Questions And Answers100% Score!!!
Quiz :Unit of measurement for frequency (pitch) - Answer :Hertz (Hz)
Quiz :Unit of measurement for intensity (loudness) - Answer :Decibel (dB)
Quiz :Risk of damage from noise - Answer :How loud (intensity) and how long
(duration)
Quiz :Steady-state or continuous noise, e.g. generator - Answer :Lasts 1
second or longer
Quiz :Impulse or Impact noise, e.g. gunfire or nail gun - Answer :Lasts less
than one second
Quiz :Parts of the outer ear - Answer :Pinna and external auditory canal
Quiz :Parts of the middle ear - Answer :Tympanic membrane, ossicles,
eustachian tube
Quiz :Eustachian tube (auditory tube) - Answer :Tube connecting the middle
ear to the pharynx and equalizes middle ear space with atmospheric pressure
Quiz :Conductive HL occurs here - Answer :Outer or middle ear
Quiz :Sensorineural hearing loss - Answer :Hearing loss resulting from damage
to the inner ear (cochlea) or the auditory nerve
Quiz :Noise-induced hearing loss (NIHL) - Answer :Condition caused by the
destruction of hair cells, the organs responsible for hearing, as a result of
sounds that are "too long, too loud, or too close"; a sensorineural hearing loss
Quiz :Mixed hearing loss - Answer :Combination of conductive and
sensorineural types in the same ear
Quiz :Middle ear bones (ossicles) - Answer :Malleus (hammer), incus (anvil),
stapes (stirrup)
, Quiz :Possible early symptoms/signs of noise induced hearing loss -
Answer :Tinnitus; difficulty understanding in presence of background noise;
read visual cues
Quiz :Auditory effects of noise - Answer :NIHL; tinnitus; hyperacusis
Quiz :Non-auditory effects of noise - Answer :annoyance
sleep disturbance
attention
motivation
stress reactions
cardiovascular problems
endocrine problems
Quiz :3 foot rule - Answer :Good rule of thumb to recognize hazardous noise
exposure levels/situations: the 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
Quiz :OSHA (Occupational Safety and Health Administration) versus National
institute of Occupational Safety and Heath (NIOSH) - Answer :OSHA enforces
regulation and NIOSH recommends best practice based on science and
research
Quiz :Sound pressure level (SPL) versus hearing level (HL) - Answer :SPL
describes noise measurements taken with a sound level meter or dosimeter;
HL describes Threshold levels obtained with an audiometer; 0 dB HL is not
equal to 0 dB SPL
Quiz :Noise Dosimeter - Answer :A sound measurement device used to record
the amount of sound exposure over an extended period of
time (usually a work day)
Personal vs. Area
Quiz :Sound level meter - Answer :Uses a microphone to sense pressure
variations in sound waves; the meter converts those pressures directly into
decibels; provides a noise measurement that is a snapshot in time.
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