CAOHC 2026/2027 QUESTIONS AND SOLUTIONS RATED
A+
✔✔tinnitus, hyperacusis, difficulty understanding speech - ✔✔Auditory effects of
hearing loss include
✔✔1-2 - ✔✔All audiometer tones should be presented for ____________ seconds
✔✔500Hz, 1000Hz, 2000Hz, 3000 Hz, 4000Hz, 6000Hz - ✔✔The test frequencies
required by ANSI S3.21 are
✔✔DD 2215 - ✔✔Which form is used to document the baseline audiogram?
✔✔annually - ✔✔Electroacoustic calibrations are required
✔✔name - ✔✔Noise-exposed personnel must be identified by __________
✔✔21 - ✔✔A worker with an OSHA-recordable hearing loss must be notifed in writing
within __________ days
✔✔Significant threshold shift (standard threshold shift for OSHA) - ✔✔A change in
hearing threshold (+ or -), relative to the baseline audiogram, of an average of 10 dB or
more, at 2000, 3000, and 4000 Hz, in one or both ears is called?
✔✔25 - ✔✔For an STS to be considered recordable, it must be work-related and result
in average hearing thresholds greater than or equal to __________ dB average at 2000,
3000, and 4000 Hz in the effected ear
✔✔diagnose - ✔✔A Certified Occupation Hearing Conservationist (COHC) cannot
__________ patients
✔✔Occlusion effect - ✔✔The effect that makes the user's voice sound deeper
✔✔resistance - ✔✔When checking your HPD for the proper fit, you should feel
_____________ when you tug or try to remove the HPD
✔✔continuous/impulse - ✔✔While wearing level dependent earplugs, a close filter
provides maximum prtection for both ______________ noise and _______________
noise
✔✔soft - ✔✔An advantage of the TCAPS HPD is that it amplifies __________ sounds
✔✔lower - ✔✔The __________ the number is dB HL, the better the hearing is
, ✔✔False - ✔✔True or False: Audiometric booths must be sound proof
✔✔Temporary Threshold Shift (TTS) - ✔✔An STS that resolves on follow-up test after
auditory rest
✔✔14 - ✔✔When there is a positive STS, the patient must be __________ hours noise
free prior to retest
✔✔non-occupational - ✔✔Lawn care, power tools/equipment, firearms, music, and
motorcycles are examples of a __________________________ noise source
✔✔occupational (civilian) - ✔✔agriculture, mining and railroads are examples of a
__________________ noise source
✔✔outer ear - ✔✔What part of the ear collects and localizes sound waves?
✔✔middle ear - ✔✔Which part of the ear is an acoustic transformer and provides
pressure equalization?
✔✔conductive and sensorineural components - ✔✔Mixed hearing loss is a combination
of
✔✔20-20,000 Hz - ✔✔What is the audible frequency range at birth?
✔✔check the ear canal for any occlusions - ✔✔Prior to fitting an earplug, the OHC
should
✔✔pure - ✔✔Air conduction audiometry in hearing conservation testing consists of
__________ tones of varying frequencies
✔✔lack of focus, distraction, nervousness, tinnitus, fear, sleepiness - ✔✔When should
you conduct manual audiometry?
✔✔21 days - ✔✔Confirmation of an STS must take place within
✔✔administrative - ✔✔Developing an SOP requiring workers to rotate work areas that
reduces noise exposure is an example of an __________________ control
✔✔5 - ✔✔When using double hearing protection, DoD allows an addition of
__________ dB to the derated NRR of the earplug
✔✔ototoxic agents - ✔✔Certain industrial chemicals, asphyxiates, or medications that
can compound the damaging effect of noise on the hair cells within the cochlea
A+
✔✔tinnitus, hyperacusis, difficulty understanding speech - ✔✔Auditory effects of
hearing loss include
✔✔1-2 - ✔✔All audiometer tones should be presented for ____________ seconds
✔✔500Hz, 1000Hz, 2000Hz, 3000 Hz, 4000Hz, 6000Hz - ✔✔The test frequencies
required by ANSI S3.21 are
✔✔DD 2215 - ✔✔Which form is used to document the baseline audiogram?
✔✔annually - ✔✔Electroacoustic calibrations are required
✔✔name - ✔✔Noise-exposed personnel must be identified by __________
✔✔21 - ✔✔A worker with an OSHA-recordable hearing loss must be notifed in writing
within __________ days
✔✔Significant threshold shift (standard threshold shift for OSHA) - ✔✔A change in
hearing threshold (+ or -), relative to the baseline audiogram, of an average of 10 dB or
more, at 2000, 3000, and 4000 Hz, in one or both ears is called?
✔✔25 - ✔✔For an STS to be considered recordable, it must be work-related and result
in average hearing thresholds greater than or equal to __________ dB average at 2000,
3000, and 4000 Hz in the effected ear
✔✔diagnose - ✔✔A Certified Occupation Hearing Conservationist (COHC) cannot
__________ patients
✔✔Occlusion effect - ✔✔The effect that makes the user's voice sound deeper
✔✔resistance - ✔✔When checking your HPD for the proper fit, you should feel
_____________ when you tug or try to remove the HPD
✔✔continuous/impulse - ✔✔While wearing level dependent earplugs, a close filter
provides maximum prtection for both ______________ noise and _______________
noise
✔✔soft - ✔✔An advantage of the TCAPS HPD is that it amplifies __________ sounds
✔✔lower - ✔✔The __________ the number is dB HL, the better the hearing is
, ✔✔False - ✔✔True or False: Audiometric booths must be sound proof
✔✔Temporary Threshold Shift (TTS) - ✔✔An STS that resolves on follow-up test after
auditory rest
✔✔14 - ✔✔When there is a positive STS, the patient must be __________ hours noise
free prior to retest
✔✔non-occupational - ✔✔Lawn care, power tools/equipment, firearms, music, and
motorcycles are examples of a __________________________ noise source
✔✔occupational (civilian) - ✔✔agriculture, mining and railroads are examples of a
__________________ noise source
✔✔outer ear - ✔✔What part of the ear collects and localizes sound waves?
✔✔middle ear - ✔✔Which part of the ear is an acoustic transformer and provides
pressure equalization?
✔✔conductive and sensorineural components - ✔✔Mixed hearing loss is a combination
of
✔✔20-20,000 Hz - ✔✔What is the audible frequency range at birth?
✔✔check the ear canal for any occlusions - ✔✔Prior to fitting an earplug, the OHC
should
✔✔pure - ✔✔Air conduction audiometry in hearing conservation testing consists of
__________ tones of varying frequencies
✔✔lack of focus, distraction, nervousness, tinnitus, fear, sleepiness - ✔✔When should
you conduct manual audiometry?
✔✔21 days - ✔✔Confirmation of an STS must take place within
✔✔administrative - ✔✔Developing an SOP requiring workers to rotate work areas that
reduces noise exposure is an example of an __________________ control
✔✔5 - ✔✔When using double hearing protection, DoD allows an addition of
__________ dB to the derated NRR of the earplug
✔✔ototoxic agents - ✔✔Certain industrial chemicals, asphyxiates, or medications that
can compound the damaging effect of noise on the hair cells within the cochlea
