Exam (elaborations)
CAOHC EXAM REVIEW QUESTIONS & ANSWERS
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CAOHC EXAM REVIEW QUESTIONS & ANSWERS
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CAOHC EXAM REVIEW QUESTIONS & ANSWERSElements to an effective hearing program? - Answers- hearing protection, record
keeping, training, noise monitoring and control
In addition to noise, ____ exposure can be caused by sensorineral hearing loss? -
Answers- Ototoxicant
Intensity is measured in ____ - Answers- decibels (dB)
Frequency is measured in ___ - Answers- Hz (Hertz)
Functions of the outer ear - Answers- collects sound waves and enhances high
frequency sounds
Functions of the middle - Answers- transforms sound to mechanical energy
Excessive noise exposure is generally causes _____ hearing loss - Answers-
sensorineural
What do you do if there's no response at 30db(HL) - Answers- Increase to 50dB, and
10 thereafter if there's still no repsonse
Frequencies used to calculate and STS - Answers- 2000, 3000, and 4000 Hz
Type II (general purpose) SLMs - Answers- offer good and acceptable accuracy
When has an STS occured? - Answers- When an average 10dB or more has
Too much noise in the testing environment will most likely affect the ____Hz threshold -
Answers- 500 (lowest)
An STS results in _____ - Answers- Temporary hearing loss
Action Level in the US measured at 8-hour TWA? - Answers- 85dBA
OSHA Permissable Exposure Limit for occupational noise? - Answers- 90dB(A) TWL
What can employers do to control worker exposure to excessive noise and hearing
loss? - Answers- use quieter machines, isolating the noise source, limiting worker
exposure, or using effective hearing protection equipment
Mandatory use of hearing protection is required at - Answers- 85dB(A) TWA
Hearing Protection Devices must be made available to all workers exposed to ___ or
greater - Answers- 85dB
, _____ controls such as making changes in the workplace or scheduling that reduces
the worker's exposure to noise - Answers- Administrative
Type I (precison) of SLMs - Answers- offer the greatest accuracy
A baseline audiogram has to be obtained no later than ____ - Answers- 6 months after
inital exposure
What does SLM (sound level meter) measure? - Answers- current sound levels at a
specific location
A technician might adjust the output of an audiometer during _____ - Answers-
exhaustive calibration
If a noisy water pump's noise occurs in BURSTS, that would be considered a ______
noise - Answers- Intermittent
Problems within the outer or middle ear generally cause ____ hearing loss - Answers-
conductive
What is the familiarization? - Answers- presenting the tone at 30dBHL, awaiting a
response
The outer ear consists of the ____ and ____ - Answers- pinna and ear canal
Intensity/Amplitude is related to - Answers- loudness
The doubling of sound increases the intensity level by - Answers- 3dB
dB SPL (sound pressure level) is used to measure - Answers- sound pressure
dB(A) is used to measure - Answers- worker noise exposure in a hearing conservation
program
dB(C) is used by hearing protection manufacturers to - Answers- test the attentuation of
hearing protectors
The average hearing threshold for young, normal adults - Answers- 0dB
This dB is used to calibrate audiometers - Answers- 0dB
The simplest form of sound is a ______ _______ - Answers- pure tone
The three bones in the ear that help with hearing are the ___, _____, and the ___ -
Answers- Incus, Malleus, and Stapes
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