Goshorn Industrial Final Exam Questions and Answers Latest Update 2025-2026
What does CAOHC stand for? - Answers Council for Accreditation of Occupational Hearing Conservation
True or False: The OHC can be responsible for the diagnosis of hearing problems. - Answers False
Name at least 6 activities the OHC is trained to carry out. - Answers Take noise measurements
perform hearing screenings
refer to audiologists/physicians
Collect medical history
Perform a visual ear inspection
Maintain the Audiometer
True or False: Noise induced hearing loss can be reversed by medical treatment. - Answers False
TTS stands for _______ and the OHC needs to catch these hearing losses before they become _______. -
Answers Temporary Threshold Shift
Permanent Threshold Shifts
Name at least 3 agents besides noise that are toxic to the ear, especially when combined with noise
exposure. - Answers Heavy metals (lead, trimethyltin)
Organic solvents (toulene, xylene)
Asphyxiants (CO)
What are 3 of the most useful abilities of human hearing? - Answers Communication, perception of
warnings, diagnosing the sound of a machine malfunction
Inside the middle ear are situated three small bones called the ossicles, whose names are _______,
_______, and _______. The function of the ossicular chain is to _______. - Answers Malleus, Incus,
Stapes
Conduct sound vibrations from the tympanic membrane to the middle ear.
In the inner ear, the snail-shaped end organ for hearing is the _______. - Answers Cochlea
Noise exposed people tend to lose hearing first for the _________ tones. - Answers High frequency
Under what conditions will the OHC need to diagnose hearing disorders? - Answers If they are a properly
trained and certified audiologist or physician.
, Give 3 examples of outer or middle ear conditions that could cause a conductive hearing loss. - Answers
Otitis externa, otitis media, impacted cerumen
Under what conditions should a worker refrain from wearing earplugs? - Answers If they show
symptoms of external otitis
Name at least 5 possible causes of sensorineural hearing loss other than noise. - Answers Presbycusis,
ototoxic drugs, genetics, prenatal infection, acoustic neuroma
Why is it important for the OHC to identify a one-sided hearing loss and refer the individual to an ear
specialist if he or she has not already received an examination for this condition? - Answers These
results could be indicative of an acoustic neuroma
True or False: A hearing aid can restore hearing to normal. - Answers False
If the air molecules themselves do not move very far, what is it that does travel, sometimes long
distances? - Answers The energy created by the sound pressure wave.
Why was 20 uPa chosen as the zero reference level for the sound level meter? - Answers 20 uPa is the
smallest amount of sound pressure that can be detected by a normal ear.
What are the three most important properties of noise when hearing loss is considered? - Answers
Frequency, intensity, and time
Most occupational noise exposures fluctuate in level during the work shift. The logarithmic average
sound exposure level normalized to an 8-hour day is called the _______ exposure level, abbreviated
_______. - Answers 8-hour time-weighted average
TWA
The relationship between level and duration of an allowance noise exposure is called the _________. -
Answers exchange rate
What are the three main purposes of noise measurement in the occupational setting? - Answers Identify
overexposed workers;
asses noise problems;
measure background levels in the audiometer rooms
The integrating SLM and noise dosimeter average sound levels _______. - Answers Logarithmically
For most purposes OSHA requires the _______ (fast or slow) meter response. - Answers Slow
True or False: When measuring the peak sound pressure level of an industrial impulse, one should use
the sound level meter's "impulse" setting. - Answers False
What does CAOHC stand for? - Answers Council for Accreditation of Occupational Hearing Conservation
True or False: The OHC can be responsible for the diagnosis of hearing problems. - Answers False
Name at least 6 activities the OHC is trained to carry out. - Answers Take noise measurements
perform hearing screenings
refer to audiologists/physicians
Collect medical history
Perform a visual ear inspection
Maintain the Audiometer
True or False: Noise induced hearing loss can be reversed by medical treatment. - Answers False
TTS stands for _______ and the OHC needs to catch these hearing losses before they become _______. -
Answers Temporary Threshold Shift
Permanent Threshold Shifts
Name at least 3 agents besides noise that are toxic to the ear, especially when combined with noise
exposure. - Answers Heavy metals (lead, trimethyltin)
Organic solvents (toulene, xylene)
Asphyxiants (CO)
What are 3 of the most useful abilities of human hearing? - Answers Communication, perception of
warnings, diagnosing the sound of a machine malfunction
Inside the middle ear are situated three small bones called the ossicles, whose names are _______,
_______, and _______. The function of the ossicular chain is to _______. - Answers Malleus, Incus,
Stapes
Conduct sound vibrations from the tympanic membrane to the middle ear.
In the inner ear, the snail-shaped end organ for hearing is the _______. - Answers Cochlea
Noise exposed people tend to lose hearing first for the _________ tones. - Answers High frequency
Under what conditions will the OHC need to diagnose hearing disorders? - Answers If they are a properly
trained and certified audiologist or physician.
, Give 3 examples of outer or middle ear conditions that could cause a conductive hearing loss. - Answers
Otitis externa, otitis media, impacted cerumen
Under what conditions should a worker refrain from wearing earplugs? - Answers If they show
symptoms of external otitis
Name at least 5 possible causes of sensorineural hearing loss other than noise. - Answers Presbycusis,
ototoxic drugs, genetics, prenatal infection, acoustic neuroma
Why is it important for the OHC to identify a one-sided hearing loss and refer the individual to an ear
specialist if he or she has not already received an examination for this condition? - Answers These
results could be indicative of an acoustic neuroma
True or False: A hearing aid can restore hearing to normal. - Answers False
If the air molecules themselves do not move very far, what is it that does travel, sometimes long
distances? - Answers The energy created by the sound pressure wave.
Why was 20 uPa chosen as the zero reference level for the sound level meter? - Answers 20 uPa is the
smallest amount of sound pressure that can be detected by a normal ear.
What are the three most important properties of noise when hearing loss is considered? - Answers
Frequency, intensity, and time
Most occupational noise exposures fluctuate in level during the work shift. The logarithmic average
sound exposure level normalized to an 8-hour day is called the _______ exposure level, abbreviated
_______. - Answers 8-hour time-weighted average
TWA
The relationship between level and duration of an allowance noise exposure is called the _________. -
Answers exchange rate
What are the three main purposes of noise measurement in the occupational setting? - Answers Identify
overexposed workers;
asses noise problems;
measure background levels in the audiometer rooms
The integrating SLM and noise dosimeter average sound levels _______. - Answers Logarithmically
For most purposes OSHA requires the _______ (fast or slow) meter response. - Answers Slow
True or False: When measuring the peak sound pressure level of an industrial impulse, one should use
the sound level meter's "impulse" setting. - Answers False
