CAOHC Certification Exam With 100%
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What does CAOHC stand for? CORRECT ANSWERS Council for Accreditation in
Occupational Hearing Conservation
Who is the certification body for? CORRECT ANSWERS Occupational Hearing
Conservationist (OHCs)
Course Directors (CDs)
Professional Supervisors (PSs)
What is CAOHCs mission? CORRECT ANSWERS To promote hearing loss prevention
by enhancing the quality of occupational hearing loss prevention practices, with a focus
on:
Providing OHCs: resources and guidance to facilitate the practice of hearing loss
prevention through standardized training and credentialing
Providing CDs: training resources, curriculum oversight, and professional support to
assist in ensuring the competence of OHC's
What does CAOHC do? CORRECT ANSWERS Promote BEST PRACTICES in
occupational hearing conservation
What is a CAOHC certified student? CORRECT ANSWERS Certified occupational
hearing conservationist (COHC)
How long does a COHC certification last? CORRECT ANSWERS 5 years
What are the two effects of noise? CORRECT ANSWERS Auditory
Non-auditory
Defined auditory CORRECT ANSWERS Direct effects to the ear
What are some examples of auditory effects? CORRECT ANSWERS 1. Noise induced
hearing loss (NIHL)
2. Tinnitus (ringing in the ear)
3. Hyperacusis (high sensitivity to noise; lower tolerance for loud sounds)
,4. Communication interference
Define non-auditory CORRECT ANSWERS Other physiological and psychological
effects
What are some examples of non-auditory effects? CORRECT ANSWERS 1.
Hypertension
2. Cognitive decline
3. Stress
4. Isolation, Social withdrawal, frustration
5. Sleep disturbances
6. Degraded work performance
What are some early signs of noise induced hearing loss? CORRECT ANSWERS 1.
Difficulty understanding conversations (particularly in background noise)
2. Ringing or buzzing in the ears (tinnitus)
What are some characteristics of noise induced hearing loss? CORRECT ANSWERS 1.
Usually bilateral, always sensorineural
2. Typically affects high frequencies first; audiometric "notch" at 4000Hz
3. Primary determiners of damage are duration and intensity of sound
4. Temporary hearing threshold shifts (TTS) become permanent threshold shifts (PTS)
Name two sources of hazardous noise CORRECT ANSWERS 1. Occupational noise
exposure
2. Non-occupational noise exposure
What is the most common occupational illness and second most self reported
occupational illness for American workers? CORRECT ANSWERS Noise induced
hearing loss (NIHL)
What occupation has the highest percentage of noise induced hearing loss? CORRECT
ANSWERS Manufacturing
Approximately how many people are exposed to hazardous noise in the workplace?
CORRECT ANSWERS 30 million people
, What occupation has the highest prevalence of exposure to noise? CORRECT
ANSWERS Mining
What are the two parts of the outer ear? CORRECT ANSWERS 1. Auricle (pinna)
2. External auditory meatus (Ear canal)
What are the names of the three bones in the middle ear? CORRECT ANSWERS 1.
Malleus (hammer)
2. Incus (anvil)
3. Stapes (stirrup)
What are the smallest bones in the human body? CORRECT ANSWERS Ossicles
What are the two primary structures in the inner ear? CORRECT ANSWERS 1. Cochlea
(hearing)
2. Vestibular System (balance)
What is the vestibular system attached to? CORRECT ANSWERS The ear
What are the three types of hearing loss? CORRECT ANSWERS 1. Conductive
2. Sensorineural
3. Mixed
Where does conductive hearing loss occur? CORRECT ANSWERS The outer or middle
ear
Is conductive hearing loss treatable? CORRECT ANSWERS Yes
Where does sensorineural hearing loss occur? CORRECT ANSWERS The inner ear
Is sensorineural hearing loss treatable? CORRECT ANSWERS No
What is mixed hearing loss? CORRECT ANSWERS A combination of conductive and
sensorineural hearing loss
What is an example of an outer ear problem? CORRECT ANSWERS 1. Cerumen
impaction (excessive earwax)
2. Otitis Externa (outer ear infection)
Verified Solutions
What does CAOHC stand for? CORRECT ANSWERS Council for Accreditation in
Occupational Hearing Conservation
Who is the certification body for? CORRECT ANSWERS Occupational Hearing
Conservationist (OHCs)
Course Directors (CDs)
Professional Supervisors (PSs)
What is CAOHCs mission? CORRECT ANSWERS To promote hearing loss prevention
by enhancing the quality of occupational hearing loss prevention practices, with a focus
on:
Providing OHCs: resources and guidance to facilitate the practice of hearing loss
prevention through standardized training and credentialing
Providing CDs: training resources, curriculum oversight, and professional support to
assist in ensuring the competence of OHC's
What does CAOHC do? CORRECT ANSWERS Promote BEST PRACTICES in
occupational hearing conservation
What is a CAOHC certified student? CORRECT ANSWERS Certified occupational
hearing conservationist (COHC)
How long does a COHC certification last? CORRECT ANSWERS 5 years
What are the two effects of noise? CORRECT ANSWERS Auditory
Non-auditory
Defined auditory CORRECT ANSWERS Direct effects to the ear
What are some examples of auditory effects? CORRECT ANSWERS 1. Noise induced
hearing loss (NIHL)
2. Tinnitus (ringing in the ear)
3. Hyperacusis (high sensitivity to noise; lower tolerance for loud sounds)
,4. Communication interference
Define non-auditory CORRECT ANSWERS Other physiological and psychological
effects
What are some examples of non-auditory effects? CORRECT ANSWERS 1.
Hypertension
2. Cognitive decline
3. Stress
4. Isolation, Social withdrawal, frustration
5. Sleep disturbances
6. Degraded work performance
What are some early signs of noise induced hearing loss? CORRECT ANSWERS 1.
Difficulty understanding conversations (particularly in background noise)
2. Ringing or buzzing in the ears (tinnitus)
What are some characteristics of noise induced hearing loss? CORRECT ANSWERS 1.
Usually bilateral, always sensorineural
2. Typically affects high frequencies first; audiometric "notch" at 4000Hz
3. Primary determiners of damage are duration and intensity of sound
4. Temporary hearing threshold shifts (TTS) become permanent threshold shifts (PTS)
Name two sources of hazardous noise CORRECT ANSWERS 1. Occupational noise
exposure
2. Non-occupational noise exposure
What is the most common occupational illness and second most self reported
occupational illness for American workers? CORRECT ANSWERS Noise induced
hearing loss (NIHL)
What occupation has the highest percentage of noise induced hearing loss? CORRECT
ANSWERS Manufacturing
Approximately how many people are exposed to hazardous noise in the workplace?
CORRECT ANSWERS 30 million people
, What occupation has the highest prevalence of exposure to noise? CORRECT
ANSWERS Mining
What are the two parts of the outer ear? CORRECT ANSWERS 1. Auricle (pinna)
2. External auditory meatus (Ear canal)
What are the names of the three bones in the middle ear? CORRECT ANSWERS 1.
Malleus (hammer)
2. Incus (anvil)
3. Stapes (stirrup)
What are the smallest bones in the human body? CORRECT ANSWERS Ossicles
What are the two primary structures in the inner ear? CORRECT ANSWERS 1. Cochlea
(hearing)
2. Vestibular System (balance)
What is the vestibular system attached to? CORRECT ANSWERS The ear
What are the three types of hearing loss? CORRECT ANSWERS 1. Conductive
2. Sensorineural
3. Mixed
Where does conductive hearing loss occur? CORRECT ANSWERS The outer or middle
ear
Is conductive hearing loss treatable? CORRECT ANSWERS Yes
Where does sensorineural hearing loss occur? CORRECT ANSWERS The inner ear
Is sensorineural hearing loss treatable? CORRECT ANSWERS No
What is mixed hearing loss? CORRECT ANSWERS A combination of conductive and
sensorineural hearing loss
What is an example of an outer ear problem? CORRECT ANSWERS 1. Cerumen
impaction (excessive earwax)
2. Otitis Externa (outer ear infection)
