CAOHC COMPREHENSIVE TEST 2026
QUESTIONS WITH SOLUTIONS GRADED A+
◉ Number of workers at risk for hearing loss from exposure to
chemicals, solvents, and heavy metals. Answer: 9 million
◉ acoustic calibration. Answer: A check of the audiometer required
at least annually. not conducted by the occupational hearing
conservationist unless special training has been completed
◉ acoustic calibration system. Answer: Set of instruments that can
measure sound outputs from an audiometer and its earphones and
confirm that the acoustic output of the equipment meets
requirements of established calibration standards
◉ acoustic check. Answer: A term commonly used for checking the
acoustic seal of an earplug by cupping your hands firmly over the
ears with the earplugs inserted and then releasing. The acoustic
check is most useful in the presence of noise
◉ acoustic neuroma. Answer: Tumor of the eighth cranial nerve
,◉ acoustic trauma. Answer: Immediate, often permanent, hearing
loss due to a very loud event such as an explosion. Also called blast
injury
◉ action level (AL). Answer: Time-weighted average exposure (85
dBA in the US) at which employers must institute continuing,
effective hearing conservation programs
◉ active hearing protection devices. Answer: Hearing protection
devices that generate a signal that cancels certain incoming sounds.
Also called noise-cancelling hearing protectors
◉ administrative control. Answer: Any administrative action, such as
rotating workers to quiet areas for a certain amount of time, to limit
their overall exposure
◉ adverse effect. Answer: Undesirable or detrimental side effect
◉ age correction. Answer: A calculated allowance for hearing loss
due to age based on the theroy that, because the worker aged
between the baseline and annual audiogram, a portion of the
hearing loss was due to the natural aging process
,◉ air-bone gap. Answer: The difference between the thresholds for
hearing when the tones are delivered by air conduction versus bone
conduction
◉ air-conduction. Answer: Sound energy travelling through the air
into the ear canal, and through the middle ear
◉ ambient noise. Answer: Background sound pressure level at a
specific location. Often used as a reference level to study a new noise
source. Also called background noise
◉ American Academy of Audiology (AAA). Answer: A national
professional organization that represents audiologists. It provides
professional development, research, and increased public awareness
of hearing and balance disorders
◉ American Academy of Otolaryngology - Head and Neck Surgery
(AAO-HNS). Answer: A national professional organization
representing physician specialists who treat the ear, nose, throat and
related structures of the head and neck
◉ American Association of Occupational Health Nurses (AAOHN).
Answer: The professional organization for occupational and
environmental health nursing which provides for and delivers health
and safety programs and services to workers, worker populations
and community groups.
, ◉ American Board of Audiology (ABA). Answer: An autonomous
organization dedicated to enhancing audiologic services to the
public by promulgating universally recognized standards in
professional practice
◉ American College of Occupational and Environmental Medicine
(ACOEM). Answer: A national professional organization
representing physicians and other healthcare professionals
specializing in the field of occupational and environmental medicine
◉ American Conference of Governmental Industrial Hygienists
(ACGIH). Answer: Member-based organization that advances
occupational and environmental health
◉ American Industrial Hygiene Association (AIHA). Answer: A
national professional organization that administers comprehensive
education programs open to all practitioners in industrial hygiene,
occupational health, environmental health, and safety domestically
and abroad
◉ American National Standards Institute (ANSI). Answer:
Organization that promotes and facilitates voluntary consensus
standards and conformity assessment systems to ensure the safety
and health of consumers and the protection of the environment
QUESTIONS WITH SOLUTIONS GRADED A+
◉ Number of workers at risk for hearing loss from exposure to
chemicals, solvents, and heavy metals. Answer: 9 million
◉ acoustic calibration. Answer: A check of the audiometer required
at least annually. not conducted by the occupational hearing
conservationist unless special training has been completed
◉ acoustic calibration system. Answer: Set of instruments that can
measure sound outputs from an audiometer and its earphones and
confirm that the acoustic output of the equipment meets
requirements of established calibration standards
◉ acoustic check. Answer: A term commonly used for checking the
acoustic seal of an earplug by cupping your hands firmly over the
ears with the earplugs inserted and then releasing. The acoustic
check is most useful in the presence of noise
◉ acoustic neuroma. Answer: Tumor of the eighth cranial nerve
,◉ acoustic trauma. Answer: Immediate, often permanent, hearing
loss due to a very loud event such as an explosion. Also called blast
injury
◉ action level (AL). Answer: Time-weighted average exposure (85
dBA in the US) at which employers must institute continuing,
effective hearing conservation programs
◉ active hearing protection devices. Answer: Hearing protection
devices that generate a signal that cancels certain incoming sounds.
Also called noise-cancelling hearing protectors
◉ administrative control. Answer: Any administrative action, such as
rotating workers to quiet areas for a certain amount of time, to limit
their overall exposure
◉ adverse effect. Answer: Undesirable or detrimental side effect
◉ age correction. Answer: A calculated allowance for hearing loss
due to age based on the theroy that, because the worker aged
between the baseline and annual audiogram, a portion of the
hearing loss was due to the natural aging process
,◉ air-bone gap. Answer: The difference between the thresholds for
hearing when the tones are delivered by air conduction versus bone
conduction
◉ air-conduction. Answer: Sound energy travelling through the air
into the ear canal, and through the middle ear
◉ ambient noise. Answer: Background sound pressure level at a
specific location. Often used as a reference level to study a new noise
source. Also called background noise
◉ American Academy of Audiology (AAA). Answer: A national
professional organization that represents audiologists. It provides
professional development, research, and increased public awareness
of hearing and balance disorders
◉ American Academy of Otolaryngology - Head and Neck Surgery
(AAO-HNS). Answer: A national professional organization
representing physician specialists who treat the ear, nose, throat and
related structures of the head and neck
◉ American Association of Occupational Health Nurses (AAOHN).
Answer: The professional organization for occupational and
environmental health nursing which provides for and delivers health
and safety programs and services to workers, worker populations
and community groups.
, ◉ American Board of Audiology (ABA). Answer: An autonomous
organization dedicated to enhancing audiologic services to the
public by promulgating universally recognized standards in
professional practice
◉ American College of Occupational and Environmental Medicine
(ACOEM). Answer: A national professional organization
representing physicians and other healthcare professionals
specializing in the field of occupational and environmental medicine
◉ American Conference of Governmental Industrial Hygienists
(ACGIH). Answer: Member-based organization that advances
occupational and environmental health
◉ American Industrial Hygiene Association (AIHA). Answer: A
national professional organization that administers comprehensive
education programs open to all practitioners in industrial hygiene,
occupational health, environmental health, and safety domestically
and abroad
◉ American National Standards Institute (ANSI). Answer:
Organization that promotes and facilitates voluntary consensus
standards and conformity assessment systems to ensure the safety
and health of consumers and the protection of the environment
